Use the following to answer the question(s) below.
IT staff for a large corporation has developed the following probability distribution for the number of calls requiring troubleshooting problems per day.

-Which is true about a 99% confidence interval based on a given sample?
A) If we increase the sample size, the width of the interval will increase.
B) The interval contains 99% of the population.
C) Results from 99% of all samples will lie in this interval.
D) The interval is wider than a 95% confidence interval would be.
E) The interval is narrower than a 95% confidence interval would be.

Question

Use the following to answer the question(s) below.
IT staff for a large corporation has developed the following probability distribution for the number of calls requiring troubleshooting problems per day.

-Which is true about a 99% confidence interval based on a given sample?
A) If we increase the sample size, the width of the interval will increase. 
B) The interval contains 99% of the population. 
C) Results from 99% of all samples will lie in this interval. 
D) The interval is wider than a 95% confidence interval would be. 
E) The interval is narrower than a 95% confidence interval would be.

Quizplus · Accepted Answer

A 99% confidence interval is wider than a 95% confidence interval as it is required to include a higher proportion of the population. Increasing the sample size would likely decrease the width of the interval. However, the interval does not necessarily contain 99% of the population, and results from all samples will not necessarily lie in this interval.

Use the Following to Answer the Question(s) Below