Question

An IQ test is given to a random sample of 10 children from Oldham, yielding a sample mean of 100.0 and sample variance of 90. A 90% confidence interval , (assuming the population sampled from is normal) for the mean IQ of children in this area is given by (to one decimal place):

		(93.2,106.8)
		(94.1,105.6)
		(95.1,104.9)
		(93.3,106.7)
		(94.5,105.5)

Answer 1

Answer---->>

option e). ( 94.5, 105.5) is correct.

Here the critical value calculate from t-distribution table .