1) Find the critical value za/2 that corresponds to a degree of confidence of 72%. A) 0.97 B) 1.22 C) 1.08 D) 1.34

In the regression equation, ŷ = 2.164 + 1.3657x, and n = 6, the mean of x is 8.667, SSxx= 89.333 and Se= 3.44. A 95% confidence interval for the average of y when x=8 is ______.  a) (9.13, 17.05) b) (2.75, 23.43) c) (10.31, 15.86) d) (3.56, 22.62) e) (12.09, 14.09)

Suppose the relationship between Y and X is given by: Y = 3.1415 + 6X + error  By how much does the expected value of Y change if X increases by 2 units? (Round your answer to two decimal places: ex: 123.45)

A researcher reports t(22) = 5.30, p < .01 for an independent measures experiment. how many individuals participated in the entire experiment?