Fill in the blank. A exists between two variables when the values of one variable are...
Fill in the Blank. When determining whether there is a correlation between two variables, one should use a ____________ to explore the data visually
1. When no linear relationship exists between variable X and variable Y, r equals which of the following? a) −∞-∞ b) -1 c) 0 d) +1 e) +∞+∞ 2. Pearson’s r correlation measures the relationship between which of the following? a) Two continuous variables b) Two categorical variables c) One continuous and one categorical variable
A research analyst states that the correlation between two variables is statistically significant from zero (with r = 0.85). Which of the following conclusion is appropriate? High values of one variable tend to be associated with low values of the other variable. For every unit of change in one variable tend to be associated with .85 values of the other variable. (C) Any association between the two variables does not appear to be linear. (D) 0.85 indicates...
QUESTION 6 Suppose the correlation coefficient between two variables is found to be -0.94. Which of the following statements are true? there is a strong tendency for small values of one variable to be associated with large values of the other variable there is a weak negative relationship between the variables a scatter plot of the data points would show a clear downward trend there is a strong tendency for low values of one variable to be paired with low...
(1 point) A chi-square independence test is to be conducted to decide whether an association exists between two variables of a populations. One variable has 9 possible values and the other variable has 4. What are the degrees of freedom for the x-statistic? answer:
When investigating the relationship between two quantitative variables, we sometimes transform one of the variables in order to: a) change a linear relationship into a nonlinear one. b) conserve space. c) more accurately portray the variable. d) make the data look more Normal.
No zero-order relationship exists, but a relationship does appear when the two variables are examined in the presence of a control variable. The control variable in this situation is known as a(n) a. ghost variable. b. suppressor variable. c. distorter variable. d. incremental variable. e. magic variable
Compute the linear correlation coefficient between the two variables and determine whether a linear relation exists. Round to three decimal places X y 2 1.3 3 1.6 5 2.1 5 2.2 6 2.7 Click the icon to view the critical values table, A 0.983, a linear relation exists OB. r=0.883; a linear relation exists O C 0.883; no linear relation exists O D . r=0.983; no linear relation exists
31. Two variables are said to interact when a. The effect of one independent variable depends on the levels of the second variable b. Both variables are equally influenced by a third factor c. The two variables are differentially affected by a third variable d. Both variables produce a change in the subjects scores
(1 point) A chi-square independence test is to be conducted to decide whether an association exists between two variables of a populations. One variable has 6 possible values and the other variable has 8. What are the degrees of freedom for the x2-statistic? answer: