Author Question: A Pearson correlation is computed for a sample of n = 18 pairs of X and Y values. What correlations ... (Read 122 times)

ahriuashd · **on:** Jun 20, 2018

A Pearson correlation is computed for a sample of n = 18 pairs of X and Y values. What correlations are statistically significant with = .05, two tails?

A) correlations between 0.468 and -0.468
B) correlations greater than or equal to 0.468 and correlation less than or equal to -0.468
C) correlations between 0.456 and -0.456
D) correlations greater than or equal to 0.456 and correlation less than or equal to -0.456

Question 2

A random sample of n = 4 scores is obtained from a population with a mean of = 80 and a standard deviation of = 10. If the sample mean is M = 90, what is the z-score for the sample mean?

A) z = 20.00
B) z = 5.00
C) z = 2.00
D) z = 1.00