22 random samples were selected from a population that has a normal distribution the sample has a mean of 99 and a standard devi

Question

4 years ago

11

ation of 5 construct a 95% confidence interval for the population standard deviation .

2 answers:

strojnjashka [21] · Answer 1 · 2021-11-28T07:32:56+03:00

6 0

Answer:

4, 7

Step-by-step explanation:

gradpoint

olga2289 [7] · Answer 2 · 2021-11-28T05:18:22+03:00

Answer:

(96.91, 101.09)

Step-by-step 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:

$X-Zs/\sqrt{x} \\X+Zs/\sqrt{x}$

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

$99-1.96\cdot{5}/\sqrt{22} \\99+1.96\cdot{5}/\sqrt{22}$

The interval is (96.91, 101.09)