chapter on Estimating a Population Mean 1)Students in a statistics class conduct

Question

chapter on Estimating a Population Mean

1)Students in a statistics class conduct a survey to estimate the mean number of units students at their college are enrolled in. The students took a random sample of 50 students from their college. The students calculated a 90% confidence interval to estimate the mean number of units students at their college are enrolled in. The confidence interval was too wide to provide a precise estimate. The students are strategizing about how to produce a narrower confidence interval

. True or false? The students could produce a narrower confidence interval by increasing the sample size to 100.

2)

Students in a statistics class take a random sample of 100 students at their college and record how many units each student is enrolled in. The students compute a 90% confidence interval for the mean number of units for students at their college and get (11.93, 12.47).

Next, the students calculate a 95% confidence interval. As the confidence level increases, which of the following will happen to the interval width?

A)Decrease

B)Increase

C) Stay the same

Explanation / Answer

1) The students could produce a narrower confidence interval by increasing the sample size to 100.

Answer : TRUE

2) the students calculate a 95% confidence interval. As the confidence level increases, which of the following will happen to the interval width?

Answer : Increase

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.