a. Error of the estimate Graph the equation using the slope and the $y$-intercept. In regression, an equation that defines the line that has the best fit with your data. Furthermore, the research hypothesis, which posits a positive relationship between the variables, is also supported. a. Which of the following is the appropriate method for calculating the degrees of freedom associated with a correlation coefficient? To determine if you should accept a null hypothesis, you should compare the ______ value and the ______ value. Give three examples of types of reliabilities that use correlation coefficients and explain what they are used for. The t-test for independent means is used when each group is tested _______. 1. there is no difference between the levels of the first factor b. a. 18. Select one: Question 20 1 pts The correlation between the two variables of interest is .81, which is significant at the .0637 level. The regression line that best fits the data and minmizes the error in prediction. The null hypothesis in an independent-samples t-test would be represented as follows: In the t-test for independent samples, the actual statistical test is _______. a. - Helps to interpret the magnitude of relationships 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. _______ describes what you may have indicated to be the difference you expect back in a dependent-samples t-test. What is plane geometry? D. A z-score of -3 and +3 are the exact same distance from the population mean. If the group has 30 individuals, what are the degrees of freedom for a dependent-samples t-test? b. 3. month, Dawson engaged in the following transactions: a. Upon collecting them from the class, she will run a correlation between the scores on the two versions to determine the level of ___________ reliability. Select one: b. d. A vertical line, If the coefficient of determination between two variables is .81, what is the Pearson correlation coefficient? Indirect b. c. T statistic. Water has three normal modes that can be grouped together as the reducible representation. b. a. Correlation coefficient between two variable X and Y is 0.4 and regression coefficient of X on Y is 0.2 then the regression coefficient of Y is. Select one: Why do we use SPSS to calculate a factorial ANOVA? Zero is a word that derives from the Arabic cifa, which means "empty". The coefficient of determination is r^2. c. a 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. If you wanted to examine whether the attitudes toward learning differs based on students' grade in school (i.e., 1st, 2nd, 3rd, etc.) Write the equations for a research hypothesis with a one-tailed test and for a research hypothesis with a two-tailed test. d. b, Which of the following symbols is associated with the y-intercept in the regression equation? c. 45000 Select one: If a research hypothesis does not predict the direction of a relationship, the test is__. b. y=-2 sin x, Solve for t in each of the following compound interest equations. (e) How to modify the regression so that the new 0 measures the mean value of y when x . Students also viewed. b. Y' If a research hypothesis posits that there is a direct relationship between two variables, the test is _______. That is, will the sample correlation coefficient be the same if you exchange continuous random variables X and Y? a. c. 47% In the result _((3))^2=8.4,p< .05, what is ^2? 0 answers. d. 3.20, - used to test a hypothesis that variables are related to each other a. one tailed. c. Predictor variable False. Two-tailed. Known value of X For example, a correlation of r = 0.9 suggests a strong, positive association between two variables, whereas a correlation of r = -0.2 suggest a weak, negative association. What type of correlation did Sherry find? You run a t-test and find that your results indicate that t(38) = 1.13, p > .05. d. The square root of the phi coefficient, the amount of unexplained variance in a relationship between two variables is called: There is a significant negative relationship between depression and anxiety in this sample. The square of the phi coefficient False, Correlations can be used to examine the differences between groups. We'll start by proving 0 Var X X Y Y = 2(1 XY): The P in the null hypothesis represents the _______ of occurrences in any one category. c. 56% However, if you are correlating raw scores, you can use the reliability coefficients given in the ScorePak Item Analysis to correct the correlations according to the following formula: rxy' = rxy / [ (SQRT (rxx*ryy)], where. There is a significant positive relationship between depression and anxiety in this sample. a. .34 The higher the absolute value of the correlation coefficient, c. the more accurate the prediction of one variable from the other. Then 0 becomes uninteresting. 1- There is a strong positive linear relationship between the variables. b. Graph each function over the interval [2,2][-2 \pi, 2 \pi][2,2]. 1) A wave with frequency 3.1 Hz and amplitude 2.7 cm moves in the positive x-direction with speed 5.6 m/s. Which of the following would be the most appropriate test statistic to use? If the correlation between variables is .70, what percent of the variance is not shared variance? t) = 0 for all t; E(u2 t) = 2 for all t; E(u tu t s) = 0 for all tand swhere s6= 0; and that the time series processes are stationary. If a research hypothesis does predicts that there is a direct relationship between two variables, the test is__. Research hypothesis. a. null hypothesis. What is the dependent variable in Mark's research question? 26% Independent variable ? If there are five categories for which you are calculating a one-sample chi-square, what are the degrees of freedom? How many null hypotheses are associated with a Two-Way ANOVA? .59 Use a factorial ANOVA when you are studying more than one factor or independent variable. Select one: What does r represent? a policy can be purchased for $1. within; between over; between above; within above; between with 5 catagories and 100 observations, what is the expected frequency for a one- sample chi square test for each of the categories? - allows us to determine how much variance is accounted for by the predictor variables, together and separately. Correlation coefficients examine the relationship between variables. In the result _((3))^2=8.4,p< .05, what is .05? Question 7 1 pts Which of the following represents a possible alternative hypothesis for an analysis of variance (ANOVA)? d. H0: rxy > 0, If you posit that a relationship between two variables would be either positive or negative, what type of test should you use? Question 14 1 pts John is examining study habits and finds that as students spend more time studying, their test scores are also higher. What can the researcher conclude? d. 69%, If a simple Pearson correlation value = .362, what percentage of variance is unaccounted for? An example of a research hypothesis for a two-tailed t-test for the correlation coefficient would be that there will be a relationship between number of hours studied and grade on a test. Three examples of reliabilities that use correlation coefficients are: 1. Correlation coefficients can test this many variables at a time: The appropriate test statistic to use is the: Significant correlations are not able to indicate: What is another term for a positive correlation? If the correlation between two variables is .496, what is the coefficient of determination? What is the independent variable in Sarah's research question? Null hypothesis H0: xy = 0, Write an example of research hypothesis for a one-tailed t-test for the correlation coefficient. d. Predictor score, In multiple regression, added variables must be related to the outcome variable but ______________ with/of each other. Here, the assets are higher than . It could mean that the relationship is not linear. The square of the Pearson product-moment correlation coefficient If a research hypothesis predicts the direction of a relationship, the test is _____. The higher the absolute value of your correlation coefficient, the worse your predictive power is. b. The equation to calculate the degrees of freedoms for the one-sample chi-square test is. Which of the following is the Greek letter rho? o t/2 is the critical t-test value - a . 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 . 2. there is no difference between the levels of the second factor 1 Determine the amount of the impairment loss. When analysis of data reveals a difference between levels of a factor, what is this called? 18. Which of the following is another use of correlation coefficients? If a research hypothesis does not predict the direction of a relationship, the test is _______. 19.93 17 15 Positive correlation "Stability Coefficient of X and Y" can be abbreviated as RXY. If rGPA and SAT = .79, then we could predict the SAT score to be __________ if the GPA is high. Cut values that are greater than or equal to 0.3 inches away from 9 inches. 25% In the equation Y' = 0.650 (X) + 0.750, the "X" represents the, 30. When analysis of data reveals differential effects of one factor across levels of another factor, what is this called? d. All main effects, any interaction effect, What is another name for a regression line? - r2 x 100 Negative correlation Select one: Consider the quantified statement in part (d) above: "Vy R, 3x R,x+y In the formula that computes a t value, what does X _1 represent? a. There is no statistically significant relationship between depression and anxiety in this sample. What does the statement rxy = 0 represent? Select one: What three questions can you answer by doing a 2 x 2 factorial analysis? In our data, all classes have at least one student. b. Vision Statements - Where You're Going. Select one: A chi-square is calculated by dividing the total number of _______ by the number of _______. c. Predictor variable . 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. (d) It can be meaningless to try to interpret 0 because The intercept coecient 0 measures the mean value of y when x equals zero. False, Which of the following symbols is associated with the slope in the regression equation? The dependent variable for the study was the number of free throws made out of ten shots. What are the three null hypotheses used in a 2 x 2 factorial analysis? Which of the following illustrates the range of possible values of Pearson's product-moment correlation coefficient? Sum of squares between groups = 37 2. Very impressed. Income is the __________ variable, while level of education is the ___________ variable. d. -.96, This is another word for a positive correlation: a. Coefficient of determination So the class size x can not equal zero. xy210420630840. Find an equation for the circle with center at the point (-5,1) and radius 3. \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} If you are trying to predict Y scores from X scores, X is referred to as. Learn how to write your mission statement here. 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