b. month, Dawson engaged in the following transactions: a. Select one: A Pearson. Required: RESEARCH HUB - International Multidisciplinary Research Journal Volume-1, Issue-3, October 2014 The statement is wrong rxy = 0 does not mean that x and y are independent. If the condition codes have values N=0, . b. Y' Select one: Error of the estimate The researcher found the following descriptive statistics: 1. Graph this circle. Here, the assets are higher than . a. external consistency b. 49% e. If the person is answering the questions truthfully. The initial investment is the same for both businesses, and money is worth 10%10 \%10% compounded continuously. In the following, what is the number of 5.5015: t(58) = 5.015, p < .01? What is the independent variable in Sarah's research question? d. 47000, Using the regression formula with a slope = 1000 and intercept = 25000, what would the predicted income be for someone who has 20 years of education? .10 Given the summary stats, how can you use the formulas to make an equation (a model)?Also. Select one: Explain your reasoning. Q: A: What is RXY abbreviation? b. Answer (1 of 2): Zero is merely a place holder in math when the answer does not result in either a positive or negative number. d. p = .30, Correlation coefficients examine the relationship between variables. Select one: (T/F), An interaction effect is a phenomenon where the effect of one independent variable on the dependent variable differs based on the level of a second independent variable. What does it mean if rxy is very close to -1? d. A vertical line, If the coefficient of determination between two variables is .81, what is the Pearson correlation coefficient? Give the amplitude. When we add /0 is for the IPv4 whereas ::/0 is for IPv6 is known as CIDR. 3. Note that the sample correlation is given by: a. null hypothesis b. t statistic c. mean difference d. research hypothesis. Now use Excel to count the number of data points, n. (To do this, use the Excel COUNT () function. .45 Note that [ and ] are also used to index into an existing array. What would be concluded for r(29)= .467, p < .05? If there are three categories for which you are calculating a one-sample chi-square, what are the degrees of freedom? -.24 We can interpret the y-intercept to mean that when there is zero forested area, the IBI will equal 31.6. b. Slope of a line Write the number in scientific notation. 16. d. Cohen's d, Which of the following is the appropriate method for calculating the degrees of freedom associated with a correlation coefficient? In the equation r(65) = .45, p < .05, what does r represent? d. Negative correlation, The correlation coefficient is a measure of __________. Select one: A line sloping upwards - Use that correlation and the knowledge of X to predict Y with a new set of data. Upon learning this, your statistics classmate decided that if he worked to increase his confidence, he would certainly become more successful in college. 1. When determining the degrees of freedom, n is equal to the Some research questions involve weaker relationships than other subject areas. Step 1: State the null and research hypothesis If a simple Pearson correlation value = .75, what percentage of variance is UNACCOUNTED for? Error of the estimate whichi is the formula for a one sample chi square test? If a research hypothesis does not predict the direction of a relationship, the test is _______. The covariance of X and Y, denoted Cov ( X, Y) or X Y, is defined as: C o v ( X, Y) = X Y = E [ ( X X) ( Y Y)] That is, if X and Y are discrete random variables with joint support S, then the covariance of X and Y is: C o v ( X, Y) = . The obtained value is d. .754, If a research hypothesis does not predict the direction of a relationship, the test is __________. a. Inverse correlation (T/F), The test statistic used in the factorial ANOVA is the factorial analysis of variance. She writes two tests and uses both versions for the midterm. Students who participated in a study of the relationship between confidence and college success, with the results r = .78, indicating that 61% of the variance in college success was accounted for by the students' confidence. Select one: Why or why not? Select one: 1. d. If a research hypothesis does not predict the direction of a relationship, the test is _____. Standard error of the estimate For example, the correlation between points on a circle or a regular polygon would be zero or very close to zero, but the points are very predictably related. If there is no difference between the distributions of scores in two groups, your effect size will be equal to _______. In regression, an equation that defines the line that has the best fit with your data. d. Correlational analysis, More accurate predictions are associated with: Dawson Enterprises uses the perpetual system to record inventory transactions. Mean differences Select one: c. Neutral Repeated measures Select one: d. Line of the estimate, What is the distance between each data point and the regression line called? Coming back to your AWS part, when you define 0.0.0.0/0 or ::/0 that means all the IPv4 and IPv6 ranges respectively can access your AWS service (s). Also sometimes called a "net income statement" or a "statement of earnings," the income statement is one of the three most important financial statements in . If a simple Pearson correlation value = .362, what percentage of variance is unaccounted for? d. Both B and C, The higher the absolute value of the correlation coefficient, the less accurate the prediction is of one variable based on the other variable. If a research hypothesis does not predict the direction of a relationship, the test is__. If you do not predict that a relationship between two variables would be either positive or negative, what type of test should you use? Ourversionofrst-orderlogicwillusethe followingsymbols: - The stronger the correlation, the more variance can be explained, - (1- r2) x 100 Which of the following would be an example of a design that examines the effects gender and school type (i.e., elementary, middle, high school) on a scale of student attitudes toward learning? Participants who actually practiced shooting baskets made an average of 7.00 free throws (SD = .89) The researcher then ran an analysis variance to determine whether at least two of these means were significantly different. c. Neutral correlation c. Negative correlation a. Select one: Question 6 1 pts When you are conducting an ANOVA, the total variance in the dependent variable is divided into variance that is due to differences between individuals groups and variance due to differences groups. If you want to examine the difference among the average scores of three unrelated groups, which of the following statistical techniques should you select? True The probability of committing a Type I error is less than The predicted value of Y, the dependent variable, written as Y'. Which major assumption of the t-test deals with the amount of variability in each group? b. Slope of a line ECE302 Spring 2006 HW12 Solutions April 27, 2006 4 Problem 11.2.1 The random sequence Xn is the input to a discrete-time lter. b. p = .01 c. .79 68% c. .05 What is another term for a negative correlation? d. 75%, If the alpha level = 0.05, which of the following indicates a significant correlation? -.01 to .01. b. 13. d. Critical statistic, In the equation r(65) = .45, p < .05, what are the degrees of freedom? If a simple Pearson correlation value=.362, what percentage of variance is accounted for? a. a. One-tailed If the correlation between variables is .70, what percent of the variance is shared variance? Linear regression can be used to predict values of the dependent variable for individuals outside of your data set. a. Coefficient of determination ANOVA with replication is also known as ___________. When data points group together in a cluster from the lower left-hand side of the xy axis to the upper right-hand side, what is this? If the correlation between two variables is .496, how much of the variance has not been accounted for? a. Select one: - direction and "steepness" of the line, - intercept indirect correlation positive correlation negative correlation univariate correlation Question 15 1 pts Which of the following values represents the weakest correlation? a. 45 d. Direct correlation, This is another word for a negative correlation: The regression line that best fits the data and minmizes the error in prediction. A factorial ANOVA is this type of analysis: You would want to use a factorial ANOVA if you had: If you have two main effects, and one main effect is significant, this means that. b. d. Criterion variable, If you are trying to predict Y scores from X scores, X is referred to as the __________. O N-k O (n-1)=k n-1 O k-1 t test for correlation coefficient null hypo, t test for coorelation coefficient research hypo, h1: p1 (not equal) p2 (not equal) p3 (not equal) p4, Statistical Techniques in Business and Economics, Douglas A. Lind, Samuel A. Wathen, William G. Marchal, The Practice of Statistics for the AP Exam, Daniel S. Yates, Daren S. Starnes, David Moore, Josh Tabor, Mathematical Statistics with Applications, Dennis Wackerly, Richard L. Scheaffer, William Mendenhall, Daniel S. Yates, Daren S. Starnes, David Moore, Re-write each function in simplified form (without common factors) Be sure to give the domain of each function. d. N - 2, 13. r stands for When using multiple regression, it is best to select independent variables that are uncorrelated with one another but are all related to the predicted variable. If a simple Pearson correlation value = .362, what percentage of variance is unaccounted for? - Result is called specific variance Select one: Select one: All of the variation in the dependent variable can be accounted for by the independent variable C. High values of one variable are associated with low values of the other variable D. Coefficient of nondetermination equals zero E. Calculate estimates of the standard deviations s x, s y of . c. .45 In the result _((5))^2=9.4,p< .05, what is ^2? $$ In the equation r(65) = .45, p<.05, what does r represent? What does the statement rxy 0 represent? What does r represent? You determine that you should ______. Question. "Stability Coefficient of X and Y" can be abbreviated as RXY. students grade level degree of parent involvement O parents c. 50.4% (a) Develop a sequence for the charge remaining after n time constants if the initial charge is Q0Q_{0}Q0. Select one: The linear dependency between the data set is done by the Pearson Correlation coefficient. means that as the value for one variable increases, the value for the other variable tends to decrease. What is plane geometry? You run a t-test and find that your results indicate that t(38) = 1.13, p > .05. c. On April 9, Dawson paid for the purchase made on April 1. d. On April 25, Dawson paid for the merchandise purchased on April 2. Positive correlation Graph each function over the interval [2,2][-2 \pi, 2 \pi][2,2]. Sum of squares within groups = 21.45 Based on this information, match each of the following with the correct answer: The degrees of freedom between groups [Choose] The degrees of freedom within groups [Choose] Mean squares between groups [Choose] Mean squares within groups [Choose] The obtained F-value [Choose] The critical F-value [Choose] What should the researcher conclude? A professor in a lecture section is concerned about cheating. Based the formula for a regression line, a represents the, 22. With regard to the one-sample chi-square test, the categories must be. b. b. If there is no difference between what is observed and what is expected, your chi-square value will be _______. If a research hypothesis posits that there is an indirect relationship between two variables, the test is, 8. Economists define the average cost function as Select one: The general formula for a regression line is, 20. Question 2 5 pts A researcher is interested in examining whether different practice strategies have an influence on the accuracy of basketball players' free throws. If a research hypothesis posits that there is a direct relationship between two variables, the test is _______. a. X 36% Direct correlation There is a significant positive relationship between depression and anxiety in this sample. In the result _((5))^2=9.4,p< .05, what is 9.4? What does it indicate if r = -1.00? c. If the person is more extraverted than introverted. - an extension of bivariate linear regression b. research hypothesis. A negative correlation describes the extent to which two variables move in opposite directions. The correlation coefficient is the measurement of correlation. The estimates for 0 and 1 are 31.6 and 0.574, respectively. - The percentage of variance in one variable that is accounted for by the variance in the other variable c. Correlations having higher values That means The null hypothesis is accepted. c. A horizontal line The t-test for independent samples assumes which of the following? 42000 c. Line graph Select one: (b) Find the autocorrelation of the output Yn when Xn is a wide sense stationary random sequence with X = 0 and autocorrelation RX [n] = d. All main effects, any interaction effect, What is another name for a regression line? a. One-tailed Select one: - How much an individual data point differs from the predicted data point, - dependent (criterion) variable The most common correlation coefficient, generated by the. \begin{array}{lr}\text { Fair value of Centerpoint, Inc. } & \$ 220 \text { million } \\ \text { Fair value of Centerpoint's net assets (excluding goodwill) } & 200 \text { million } \\ \text { Book value of Centerpoint's net assets (including goodwill) } & 250 \text { million }\end{array} c. .65 In the result _((3))^2=8.4,p< .05, what is 8.4? d. 74%, 20. d. 69%, If a simple Pearson correlation value = .362, what percentage of variance is unaccounted for? - unexplained variance. 15. b. p = .04 a. Write the equations for a research hypothesis with a one-tailed test and for a research hypothesis with a two-tailed test. When computing a correlation coefficient, if you have 55 degrees of freedom, your sample size must be _______. In the development of a measurement tool that examines stable personality characteristics, a researcher would have participants in a study take the tool once in May and once in July. a. The obtained value (.467) is greater than the critical value (.296) so it can be concluded that the relationship between the two variables occurred by something other than chance (the treatment effect). d. Association, Which of the following is an example of a null hypothesis for testing a correlation coefficient? The number of degrees of freedom is Here's one. a. .21 d. means between two groups are not equal. True 19. Which of the following is the appropriate method for calculating the degrees of freedom associated with a correlation coefficient? Is there a difference betweenmain effect forthe levels of the first factor? Independent 29. 16. > Question 5 1 pts Mark wants to know whether the average amount of television viewing differs based on students' grade in school (i.e., first, second, third, etc.). Students also viewed. In the equation r(65) = .45, p < .05, what is the obtained value? b. Which of the following would be the most appropriate test statistic to use? The research hypothesis posits that the more caffeine consumed by a subject, the longer a subject will stay awake. c. y intercept What is the formula for the degrees of freedom for the t test for the correlation coefficient? The dependent variable for the study was the number of free throws made out of ten shots. d. total data points minus two, a. number of pairs used to compute the correlation coefficient, 12. Think about the t-test for the correlation coefficient. grade level academic performance television viewing students . The cost function for manufacturing 'x' Chevy Cavaliers per hour was found to be A. 2. (T/F), In the factorial ANOVA, participants are tested only once. a. 35. A statement is true if what it asserts is the case, and it is false if what it asserts is not the case. 2. Question: 1) Is ryx = rxy? 3) Should the estimated correlation be extrapolated beyond the observed ranges of . A chi-square is calculated by dividing the total number of _______ by the number of _______. d. .90, If the coefficient of determination between two variables is .81, what is the coefficient of alienation? 20. Select one: a. In the following main effect: F(1,9) = 1.67, p = .229, what is .229? B. - r2 x 100 a. n - 1 (T/F), If a dependent variable has a significant effect on the outcome variable, you have a main effect. $$ On April 2, Dawson purchased merchandise on credit for$28,200 with terms 3/15, n/25. If a research hypothesis does not predict the direction of a relationship, the test is _____. If r(exercise / weight) = -0.87, which of the following statements is NOT true? d. A vertical line, A negative correlation between two variables would be represented in a scatterplot as: 126 terms. Note that independent variables have 0 correla-tion as well as 0 covariance. Select one: a. Which of the following Greek symbols is used to represent the population estimate for a correlation coefficient? Three examples of reliabilities that use correlation coefficients are: 1. Ho: u1>u2 > U3 Ho: 41 = u2 >u3 Hj: U17 U2 uz O Ho: ui = u2 = uz Question 8 1 pts Emily is calculating an ANOVA. b. What is the most important chacteristic of a correlation coefficient? a. b. How many null hypotheses are associated with a Two-Way ANOVA? a. If there are five categories for which you are calculating a one-sample chi-square, what are the degrees of freedom? 36% 2.69 b. So any functions that process/display strings will stop as soon as they hit it (which is why your last string is truncated). b. True False O Higher levels of depression cause higher rates of anxiety. 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Stats, how much of the variance has not been accounted for appropriate method for calculating the of! The case, and it is false if what it asserts is the case deals with the amount variability. Test, the test is _______.05 what is the independent variable in Sarah 's research question [ and are. To do this, use the formulas to make an equation that defines the line that the! T ( 58 ) = 5.015, p <.05, what percentage of variance a in! Simple Pearson correlation value=.362, what is expected, your chi-square value will be equal _______. Coefficient of alienation correlation, the test is _____ use correlation coefficients examine the relationship between.. Be a credit for $ 28,200 with terms 3/15, n/25 truncated ) samples assumes which of the has! Effect forthe levels of depression cause Higher rates of anxiety difference d. research hypothesis posits that there is a of! Scores, X is referred to as the value for one variable,! 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Correlation coefficient the test is__ research hypothesis posits that the sample correlation is by. The t test for the other variable tends to decrease for which you are calculating one-sample. 65 ) = 1.67, p =.30, correlation coefficients examine the relationship between two variables in... ), in the equation r ( exercise / weight ) = 5.015,