Author Question: What does bivariate correlational analysis do? (Select all that apply.) a. Provides an idea of ... (Read 72 times)

kodithompson · **on:** Jul 8, 2018

What does bivariate correlational analysis do? (Select all that apply.)

a. Provides an idea of which variable causes the other one
b. Reflects a two-way connection or pattern
c. Measures the strength of multiple relationships connected with a concept
d. Measures the strength of the relationship between two variables
e. Determines the direction of the relationship between two variables

Question 2

A Pearson's correlational analysis examines the relationship between variable A, hours of sleep per week, and B, symptom severity, in 43 women with post-polio syndrome.

In accessing the table of values, the researcher uses which of the following numbers for degrees of freedom?
a. 2
b. 4
c. 41
d. 43

Benayers · **Reply #1 on:** Jul 8, 2018

Answer to Question 1

ANS: B, D, E
Bivariate correlational analysis measures the magnitude of linear relationship between two, and only two, variables and is performed on data collected from a single sample. Correlational analysis provides two pieces of information about the data: the nature or direction of the linear relationship (positive or negative) between the two variables and the magnitude (or strength) of the linear relationship.

Answer to Question 2

ANS: C
Every inferential statistic has is own formula for degrees of freedom (numbers of values that are free to vary). The formula for degrees of freedom (df) for a Pearson r is n 2. Thus, in this case, the df is 43 2 = 41.