Question

15 multiple choice 4 points
determine the width of the given confidence interval.
an environmental journal discussing current water usage within the us reports, with 95% confidence, the average number of household gallons used per person per day is between 82 and 88. the study was based on a random sample of 30 individuals throughout the nation.
82
88
3
85
6

Explanation:

Step1: Recall the formula for the width of a confidence interval

The width of a confidence interval is calculated as \( \text{Upper limit}-\text{Lower limit}\).

Step2: Identify the upper and lower limits

Here, the lower limit \(L = 82\) and the upper limit \(U=88\).

Step3: Calculate the width

Using the formula \(W=U - L\), we substitute the values: \(W=88 - 82\).

Answer:

\(6\) (the fifth option)