Question

In: Statistics and Probability

Use the given information to find the number of degrees of​ freedom, the critical values chi...

Use the given information to find the number of degrees of​ freedom, the critical values chi Subscript Upper L Superscript 2 and chi Subscript Upper R Superscript 2​, and the confidence interval estimate of sigma. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Platelet Counts of Women 90​% ​confidence; nequals24​, sequals65.4.

Solutions

Expert Solution

Solution :

Given that,

s = 65.4

2R = 2/2,df = 35.173

2L = 21 - /2,df = 13.091

The 90% confidence interval for is,

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

  23 * 65.6 2 / 35.173 < < 23 * 65.6 2 / 13.091

52.8859 < < 86.6889

(52.8859 , 86.6889)


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