Author Question: To go from the equation in the previous problem to the equation for t we must a. substitute ... (Read 52 times)

rmenurse

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To go from the equation in the previous problem to the equation for t we must
 
  a. substitute sample means for population means.
  b. substitute sample variances for population variances.
  c. substitute sample standard deviations for population variances.
  d. draw very large samples.

Question 2

The t statistic differs from z in that
 
  a. it applies to variances.
  b. it is used when population variances are not known.
  c. it involves an assumption of normality.
  d. and b) but not c).



izzat

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Answer to Question 1

B

Answer to Question 2

B



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