It Is Desired to Estimate the Average Time It Takes $n = 189$

question 14

Multiple Choice

It is desired to estimate the average time it takes Statistics students to finish a computer project to within two hours at 90% reliability. It is estimated that the standard deviation of the times is 14 hours. How large a sample should be taken to get the desired interval?

• A) \(n = 189\)
• B) \(n = 231\)
• C) \(\mathrm { n } = 325\)
• D) \(n = 133\)

---

Definitions:

NHL Team

A professional ice hockey team that competes in the National Hockey League, a major league in North America.

Average Attendance

The mean number of individuals present at a series of events or within a given period.

Negative Residual

The difference between an observed value and the predicted value in a regression analysis, specifically when the observed value is less than the predicted value.

Electricity Usage

The amount of electric energy consumed by a device, home, or organization over a specific period.