Hypothesis Testing — Quiz Answers

A researcher collated data on Americans’ leisure time activities. She found the mean number of hours spent watching television each weekday to be 2 point 7 hours with a standard deviation of 0 point 4 hours. Jonathan believes that his football team buddies watch less television than the average American. He gathered data from 15 football teammates and found the mean to be 2 point 3 Which of the following shows the correct z -statistic for this situation?

The College Board states that the average math SAT score is 514 with a standard deviation of 117 Colleen gathered data from 50 students in her graduating class and found the average score to be 523 She thinks that her class’s math SAT score is different from the average. Which of the following are the correct null hypothesis and alternate hypothesis?

A recent survey of 8 comma 000 high school students found that the mean price of a prom dress was 195 point 0 0 dollars with a standard deviation of 12 point 0 0 dollars Alyssa thinks that her school is more fashion conscious and that students spent more than ​$⁢195.00 She collected data from 20 people in her high school and found that the average price spent on a prom dress was 208 point 0 0 dollars Which of the following are the correct null hypothesis and alternate hypothesis?

A real estate agent is working for a developer who claims that the average commute time to downtown is 20 minutes with a standard deviation of 7 minutes. Stephon is an independent real estate agent and wants to check the times for his client. He took a random sample of 15 commute times and found an average of 26 minutes. He did hypothesis testing using a significance level of 5 percent Which conclusion could he make?

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. On average, when surveyed regarding job satisfaction, teachers give a score of 3 point 3 out of 5 with a standard deviation of 0 point 6 When the authors of the study interviewed 40 teachers who supplemented with their own materials, they found 3 point 5 to be the mean. The authors wanted to know if the group of teachers that could choose supplementary curriculum had a higher level of job satisfaction. They used a significance level of 1 percent Which of the following statements is valid based on the results of the test?

A recent survey of 8 comma 000 high school students found that the mean price of a prom dress was 195 point 0 0 dollars with a standard deviation of 12 point 0 0 dollars Alyssa thinks that her school is more fashion conscious and spent more than 195 point 0 0 dollars She collected data from 20 people in her high school and found that the average price spent on a prom dress was 208 point 0 0 dollars Which of the following is the correct z -statistic for this situation?

Zachary completes a hypothesis test and finds that he rejects the null hypothesis. Which statement gives a reason for rejecting the null hypothesis?

A researcher collated data on Americans’ leisure time activities. She found the mean number of hours spent watching television each weekday to be 2 point 7 hours with a standard deviation of 0 point 2 hours. Jonathan believes that his football team buddies watch less television than the average American. He gathered data from 40 football teammates and found the mean to be 2 point 3 Which of the following are the correct null and alternate hypotheses?

Dion is performing a hypothesis test in which the population mean is 92 and the standard deviation is 2 His sample size is 7 with a mean of 93 point 5 Which of the following correctly depicts the z -statistic for this data?

Brett is performing a hypothesis test in which the population mean is 310 and the standard deviation is 20 His sample data has a mean of 295 and a sample size of 50 Which of the following correctly depicts the z -statistic for Brett’s data?