A linear regression equation has b = 3 and a = - 6. What is the ...

[Sufayan.ah]

A linear regression equation has b = 3 and a = - 6. What is the predicted value of Y for X = 4?
 
  A)  = 6
  B)  = -21
  C)  = -2
  D) This cannot be determined without additional information.

Question 2

A researcher conducts a hypothesis test to evaluate the effect of a treatment that is expected to increase scores. The hypothesis test produces a z-score of z = 2.37. If the researcher is using a one-tailed test, what is the correct statistical decision?
 
  A) Reject the null hypothesis with  = .05 but not with  = .01.
  B) Reject the null hypothesis with either  = .05 or  = .01.
  C) Fail to reject the null hypothesis with either  = .05 or  = .01.
  D) This cannot be answered without additional information.

[IRincones]

Answer to Question 1

A

Answer to Question 2

B