167k views
5 votes
22 random samples were selected from a population that has a normal distribution the sample has a mean of 99 and a standard deviation of 5 construct a 95% confidence interval for the population standard deviation .

2 Answers

5 votes

Answer:

4, 7

Explanation:

gradpoint

User Justrusty
by
8.5k points
1 vote

Answer:

(96.91, 101.09)

Explanation:

To calculate the interval, you require the Z value at 95% confidence interval. The Z value is 1.96. The formula to calculate the confidence interval:


X-Zs/√(x) \\X+Zs/√(x)

Where X is the mean and s is the standard deviation and x the sample size:


99-1.96\cdot{5}/√(22) \\99+1.96\cdot{5}/√(22)

The interval is (96.91, 101.09)

User Nahuel Fouilleul
by
8.0k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories