MATH 225N Week 8 Final Exam (Version 1)
1. Question: A fitness center claims that the mean amount of time that a person spends at the gym
per visit is
... [Show More] 33 Identify the null hypothesis, H0, and the alternative hypothesis, Ha, in terms of the
parameter μ.
2. Question: The answer choices below represent different hypothesis tests. Which of the choices
are right-tailedtests? Select all correct answers.
3. Question: Find the Type II error given that the null hypothesis, H0, is: a building inspector claims
that no more than 15%of structures in the county were built without permits.
4. Question: Suppose a chef claims that her meatball weight is less than 4ounces, on average.
Several of her customers do not believe her, so the chef decides to do a hypothesis test, at
a 10% significance level, to persuade them. She cooks 14 The mean weight of the sample
meatballs is 3.7 ounces. The chef knows from experience that the standard deviation for her
meatball weight is 0.5 ounces…….What is the test statistic (z-score) of this one-mean hypothesis
test, rounded to two decimal places?
5. Question: What is the p-value of a right-tailed one-mean hypothesis test, with a test statistic
of z0=1.74? (Do not round your answer; compute your answer using a value from the table
below.)…
51.61.71.81.90.000.9330.9450.9550.9640.9710.010.9340.9460.9560.9650.9720.020.9360.9470.
9570.9660.9730.030.9370.9480.9580.9660.9730.040.9380.9490.9590.9670.9740.050.9390.9510
.9600.9680.9740.060.9410.9520.9610.9690.9750.070.9420.9530.9620.9690.9760.080.9430.954
0.9620.9700.9760.090.9440.9540.9630.9710.977
6. Question: Kenneth, a competitor in cup stacking, claims that his average stacking time
is 2seconds. During a practice session, Kenneth has a sample stacking time mean of 7.8 seconds
based on 11 trials. At the 4% significance level, does the data provide sufficient evidence to
conclude that Kenneth’s mean stacking time is less than 8.2 seconds? Accept or reject the
hypothesis given the sample data below.
7. Question: A recent study suggested that 81%of senior citizens take at least one prescription
medication. Amelia is a nurse at a large hospital who would like to know whether the percentage
is the same for senior citizen patients who go to her hospital. She randomly selects 59 senior
citizens patients who were treated at the hospital and finds that 49 of them take at least one
prescription medication. What are the null and alternative hypotheses for this hypothesis test?
8. Question: A researcher claims that the proportion of cars with manual transmission is less
than 10%. To test this claim, a survey checked 1 [Show Less]