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CONDUCTING A HYPOTHESIS Final exam 2024 complete Question and Answers

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CONDUCTING A HYPOTHESIS Final exam 2024 complete Question and Answers A study investigated the job satisfaction of teachers allowed to choose supplementary curriculum for their classes versus teachers who were assigned all curricular resources for use in their classes. The authors of the stu...

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  • August 13, 2024
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  • CONDUCTING A HYPOTHESIS
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CONDUCTING A HYPOTHESIS Final exam 2024
complete Question and Answers

A study investigated the job satisfaction of teachers allowed to choose supplementary curriculum for
their classes versus teachers who were assigned all curricular resources for use in their classes. The
authors of the study wanted to know if the two groups of teachers had different levels of job
satisfaction. They will use a significance level of 5% for their test.

-1.96 and 1.96




Tyesha found that the z-statistic was 2.1 and that the critical z-values were -1.96 and 1.96. Which of
the following is a valid conclusion based on these results?

One can reject the null hypothesis.




16

A consumer protection group randomly checks the volume of different beverages to ensure that
companies are packaging the stated amount. Each individual volume is not exact, but a volume of iced
tea beverages is supposed to average to 300 mL with a standard deviation of 3 mL. The consumer
protection group sampled 20 beverages and found the average to be 298.4 mL. Which of the following
is the most restrictive level of significance on a hypothesis test that would indicate the company is
packaging less than the required average 300 mL?

2.5%




David wants to complete a hypothesis test with the least amount of probability for error. If he sets the
significance level to 1%, assuming his sample is truly random, what else could he adjust in the test in
order to reduce error?

He could increase the sample size.

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