Describe what is meant by a negative relationship and a positive

1) Describe what is meant by a negative relationship and a positive relationship between two variables.

2) A sample of n = 25 pairs of scores (X and Y values) produces a correlation of r = –0.40. Are these sample data sufficient to conclude that there is a significant non-zero correlation between X and Y in the population? Use a two-tailed test at the .05 level of significance.

3) For the data below:

a. Compute the Pearson correlation.

b. Find the regression equation for predicting Y from X.

X       Y

5      10

3       6

6        7

4       3

2       4