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

[kodithompson]

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]

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.

[kodithompson]

TYSM

[atrochim]

Gracias!