Exam (elaborations)
STA 2023 test 4
Exam of 2 pages for the course 637240-past-paper-bmat-2020-section-1-answer-sheet at 637240-past-paper-bmat-2020-section-1-answer-sheet (STA 2023 test 4)
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STA 2023 test 4Large 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
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