STAT 330 - Chapter 10 Complete Questions And Correct Answers (Verified Answers) Already Graded A+ | Guaranteed Success!! Newest Exam | Just Released!!!

STAT 330 - Chapter 10 Complete Questions And Correct Answers
(Verified Answers) Already Graded A+ | Guaranteed Success!!
Newest Exam | Just Released!!!



Q: What is the decision rule using p-value?


Reject H0 if p-value < α, otherwise fail to reject H0.


Q: What is a Type I error?


Rejecting H0 when it is true.


Q: What is a Type II error?


Failing to reject H0 when it is false.


Q: What is the significance level α?


The probability of a Type I error.


Q: What is the power of a test?


The probability of correctly rejecting H0 (1 - β).


Q: What is a one-tailed test?


A test where H1 specifies direction (>, <).

, Q: What is a two-tailed test?


A test where H1 specifies ≠.


Q: What test is used for population mean when σ is known?


z-test.


Q: What test is used for population mean when σ is unknown?


t-test with n-1 degrees of freedom.


Q: What test is used to compare two means with equal variances?


Pooled two-sample t-test.


Q: What test is used to compare two means with unequal variances?


Welch's two-sample t-test.


Q: What test is used for a population proportion?


z-test for proportions.


Q: What test is used to compare two proportions?


z-test for difference in proportions.