IMPORTANT (PLEASE READ): (1) This is NOT a sample exam (may be similar or
not). (2) I made this practice problems solely by myself.
* [
] = possible choices
. You will have choices on the exam, so don’t stress out if
you did not get the exact words for fill in the blank questions.
Example 1 A doctor claims that the average recovery time from knee surgery is 5 months. Believing that the average recovery time is actually longer than 5 months, we gather a sample of n=44 knee surgery patients and find that their average recovery time is 5.2 months. The correct null and alternative hypothesis would be: H₀: Hₐ: Assuming the relevant pvalue is 0.035, complete the conclusion below: We ________ the null hypothesis. We _______ [have, don’t have] evidence that the average recovery time of knee surgery patients is greater than 5 months. Example 2 A hospital is interested in knowing whether there is a difference in proportions of males and females who regularly visit the doctor. A survey is sent out to 150 randomly chosen U.S. adults, asking the person’s biological gender and whether they regularly visit the doctor or not. Let males be group 1 and females as group 2, the difference in proportions between the two groups who regularly visit the doctor is 0.13. The correct null and alternative hypothesis would be: H₀: Hₐ:
Assuming the relevant pvalue is 0.043, complete the conclusion below:
Example 3 Assuming we are testing the following hypotheses: H₀: p₁–p₂= 0 Hₐ: p₁–p₂≠ 0Our test statistic is p̂₁–p̂₂= 0.05 Which of the following could represent the correct randomization distribution and pvalue calculation for this situation?
B
D
Example 4 Assuming we are testing the following hypotheses: H₀: ⍴= 0 Hₐ: ρ ≠ 0The figure below is a randomization distribution with 3000 samples and clicked “twotailed” option, without changing any other settings.Based on this output, our sample statistic is __ = _______. (ex. p̂= 0.6)The pvalue is __________.
