More Confidence Interval Practice - Janet Gantert | Library

Mr. Swanson was curious about the proportion of students who use Twitter.  He took a survey of 200 students  and discovered that 146 of them used Twitter regularly.  Use this data to answer questions 1 thru  4.

2

Determine the value of the point estimate for this situation--include your calculations.

2

Calculate the Margin of Error--include your work in the "show your work" box provided. M of E =

2

Determine the 95% Confidence Interval--include your work.

1

Write a sentence that interprets the meaning of the confidence interval for this situation.

A survey of 865 voters in one state reveals that 408 approve of a tax on sugared soft drinks. Use this data to answer questions 5 thru 8.

2

Determine the value of the point estimate for this situation--include your calculations.

2

Calculate the Margin of Error--include your work in the "show your work" box provided. M of E =

2

Determine the 95% Confidence Interval--include your work.

1

Write a sentence that interprets the meaning of the confidence interval for this situation.

Tasty Creme Bakery recently tested 346 cupcakes and found that 12 had no creme inside.  Use this data to answer questions 9 thru 12.

2

Determine the value of the point estimate for this situation--include your calculations.

2

Calculate the Margin of Error--include your work in the "show your work" box provided. M of E =

2

Determine the 95% Confidence Interval--include your work.

1

Write a sentence that interprets the meaning of the confidence interval for this situation.

319 students enrolled at Del Tech were randomly selected for a transportation survey. 120 of those surveyed replied that they take the DART bus to get to their classes on campus.  Use this data to answer questions 13 thru 16.

2

Determine the value of the point estimate for this situation--include your calculations.

1

Calculate the Margin of Error--include your work in the "show your work" box provided. M of E =

2

Determine the 95% Confidence Interval--include your work.

1

Write a sentence that interprets the meaning of the confidence interval for this situation.

A study of 669 randomly selected pet stores in Florida revealed 31 of them illegally sell baby alligators.  Use this data to answer questions 17 thru 20.

2

Determine the value of the point estimate for this situation--include your calculations.

2

Calculate the Margin of Error--include your work in the "show your work" box provided. M of E =

2

Determine the 95% Confidence Interval--include your work.

1

Write a sentence that interprets the meaning of the confidence interval for this situation.

Turkey Hill Ice Cream Factory did an undercover investigation in which they randomly surveyed 234 employees. Their results found that 12.8% of the employees sample the ice cream when no one is looking.  Use this data to answer questions 21 thru 24.

2

Determine the value of the point estimate for this situation--include your calculations.

2

Calculate the Margin of Error--include your work in the "show your work" box provided. M of E =

2

Determine the 95% Confidence Interval--include your work.

1

Write a sentence that interprets the meaning of the confidence interval for this situation.

673 Delaware middle school students were randomly selected for a survey in which 29 of them responded that they believed in vampires.  Use this data to answer questions 25 thru 28.

2

Determine the value of the point estimate for this situation--include your calculations.

2

Calculate the Margin of Error--include your work in the "show your work" box provided. M of E =

2

Determine the 95% Confidence Interval--include your work.

1