A study of 40 people found that they could do on the average15 pull ups with a standard deviation of 0.6. Find the 99% confidence interval for the mean of the population.

Question

asked Oct 17, 2020 176k views

1 Answer

Badhanganesh · Answer 1 · 2020-10-24T01:00:22+0000

Answer:

[14.75, 15.24]

Explanation:

Sample mean = 15

Sample standard deviation = 0.6

Number of samples = 40

The t value for 99% confidence interval (t - critical value table) is 2.58

Now to find the 99% confidence interval for the mean of the population, we will do the following:

15-2.58*(0.6)/(√(40)) and
15+2.58*(0.6)/(√(40))

[14.75, 15.24]