1. Suppose a student guesses that 75% of RCSJ students have been to at least one professional sporting event in Philadelphia. She gathers data and finds that 189 of the 290 RCSJ students surveyed had been to at least one professional sporting event in Philadelphia. She would like to conduct a hypothesis test to see if her guess was reasonable. After seeing her results, if this student constructs a confidence interval with her sample data, what should she find?

A. Her guess of 75% will be within her interval.

B. Her guess of 75% will be outside her interval.

2. In 2017 it was reported that 46% of Americans still had landline phones in their homes. Researchers would like to see if that percentage has declined since that time. Data was collected in 2019 and of the 655 participating Americans, 265 said they still had landlines in their homes. Is this enough evidence that the percentage of Americans with landlines in their homes has significantly decreased in the past 2 years? Identify the parameter in this problem.

A. true proportion of all Americans in 2019 who use their landline phone as their primary means of contact.

B. true proportion of all Americans in 2019 who have a landline phone in their homes.

C. true proportion of all Americans in 2017 who have a landline phone in their homes.

D. true proportion of all Americans who have both a cell phone and a landline phone.

3. In 2017 it was reported that 46% of Americans still had landline phones in their homes. Researchers would like to see if that percentage has declined since that time. Data was collected in 2019 and of the 655 participating Americans, 265 said they still had landlines in their homes. Is this enough evidence that the percentage of Americans with landlines in their homes has significantly decreased in the past 2 years? Is this a one-tailed or two-tailed test?

A. Two-tailed test

B. One-tailed test

4. In 2017 it was reported that 46% of Americans still had landline phones in their homes. Researchers would like to see if that percentage has declined since that time. Data was collected in 2019 and of the 655 participating Americans, 265 said they still had landlines in their homes. Is this enough evidence that the percentage of Americans with landlines in their homes has significantly decreased in the past 2 years? What sign should appear in the alternative hypothesis for this hypothesis test?

A. Less than

B. Greater than

C. Not equal to

5. In 2017 it was reported that 46% of Americans still had landline phones in their homes. Researchers would like to see if that percentage has declined since that time. Data was collected in 2019 and of the 655 participating Americans, 265 said they still had landlines in their homes. Is this enough evidence that the percentage of Americans with landlines in their homes has significantly decreased in the past 2 years? Calculate the sample statistic (sample percentage) in this problem based on the data collected in 2019.

A. 40.5%

B. 265%

C. 24.7%

D. 46%

6. In 2017 it was reported that 46% of Americans still had landline phones in their homes. Researchers would like to see if that percentage has declined since that time. Data was collected in 2019 and of the 655 participating Americans, 265 said they still had landlines in their homes. Is this enough evidence that the percentage of Americans with landlines in their homes has significantly decreased in the past 2 years? Identify the hypothesis (the comparison value, or the value that would appear in the the null and alternative hypotheses).

A. 40.5%

B. 46%

C. 24.7%

D. 265%

7. In 2017 it was reported that 46% of Americans still had landline phones in their homes. Researchers would like to see if that percentage has declined since that time. Data was collected in 2019 and of the 655 participating Americans, 265 said they still had landlines in their homes. Is this enough evidence that the percentage of Americans with landlines in their homes has significantly decreased in the past 2 years? Calculate the test statistic.

A. -0.28

B. -2.575

C. -28.2

D. -2.82