to estimate the average age of members of Parliament a random sample of 36 members is taken and their average age is found 48.7 years with standard deviation of 3.1 years. Assume that the age of all members is normally distributed construct 90% confidence interval of the mean age of members of Parliament
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What a goodie question??!!??!?!?
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i am brillant this is soo easy
Step-by-step explanation:
confidence interval for a population mean with a known standard deviation is based on the fact that the sample means follow an approximately normal distribution. Suppose that our sample has a mean of
¯¯¯
x
=
10
and we have constructed the 90% confidence interval (5, 15) where EBM = 5.
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