A psychologist wants to estimate the standard deviation of IQ scores.

FratBro23
Category:
Mathematics
Price: $5 USD

Question description

A psychologist wants to estimate the standard deviation of IQ scores. It is widely believed that IQ scores follow a normal distribution. Her random sample of 

21

 IQ scores has a mean of 

103

 and a standard deviation of 

12.4

. Find the 

90%

 confidence interval for the population standard deviation based on this sample. Then complete the table below.

Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. 

(If necessary, consult a list of formulas.)


Tutor Answer

(Top Tutor) Daniel C.
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School: Boston College
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