Question

Construct the confidence interval for the population standard deviation for the given values. Round your answers to one decimal place.

n = 3, s = 7.1, and c = 0.98

Answer 1

Solution :

Given that,

s = 7.1

s2 = 50.41

2R = 2/2,df = 9.210

2L = 21 - /2,df = 0.020

The 98% confidence interval for is,

(n - 1)s2 / 2/2 < < (n - 1)s2 / 21 - /2

(2)(50.41) / 9.210 < < (2)(50.41) / 0.020

3.3 < < 70.8

(3.3 , 70.8)