STA 2023 test 4

STA 2023 test 4

Large sample - ANS-n > 30

Small sample - ANS-n <= 30

Type I error occurs when you reject a true null hypothesis - ANS-True

When estimating a population proportion p, the sample size n is considered large
whenever n > 30 - ANS-False

One way of reducing the width of a confidence interval
is to reduce the confidence level - ANS-True

A null hypothesis is rejected in favor of research
hypothesis if the p-value of the test is less than
α (alpha) - ANS-True

"95% confidence interval for μ is [5, 10]" means that 95% of all population values fall in
the interval [5, 10] - ANS-False

If we do not reject the null hypothesis, we conclude
that - ANS-There is not enough statistical evidence to infer that the alternative
hypothesis is true

What is a Type II error? - ANS-failing to reject the null hypothesis when it is false

What is a Type I error? - ANS-rejecting the null hypothesis when it is true

The smaller the p-value associated with a test of
hypothesis, the stronger the support for the __________ ___________. -
ANS-Research hypothesis

Which elements of a test of hypothesis can be
specified prior to collecting data for conducting
the test? - ANS-Null hypothesis