A researcher is interested in whether students who play sports have a higher or lower body mass ...

A researcher is interested in whether students who play sports have a higher or lower body mass index (BMI) than students in the general population. The researcher is unsure whether playing sports will decrease body mass (due to more calories burned) or increase body mass (due to more muscle mass). This is a _____-tailed test and the zcv is _____.
 
  a. two; 1.96
  b. one; 1.65
  c. two; 1.65
  d. one; 1.96

Question 2

A researcher is interested in whether students who are musicians have higher intelligence test scores than students in the general population. The researcher predicts that playing a musical instrument is associated with higher intelligence test scores. This is a _____-tailed test and the zcv is _____.
 
  a. two; 1.96
  b. one; 1.65
  c. two; 1.65
  d. one; 1.96

Question 3

zcv for a one-tailed test is _____, whereas zcv for a two-tailed test is _____.
 
  a.  1.65; 1.96
  b. 1.96; 1.65
  c. .01; .05
  d. .05; .01

Question 4

The formula to determine the _____ is based on the _____.
 
  a. central limit theorem; standard deviation
  b. standard deviation; central limit theorem
  c. standard error of the mean; central limit theorem
  d. central limit theorem; z test