Question

If n=28, (x-bar)=36, and s=16, construct a confidence interval at a 95% confidence level. Assume the data came from a normally distributed population.

Give your answers to one decimal place.

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Answer 1

given data are:-

degrees of freedom = (n-1) = (28-1) = 27

t critical value for alpha= 0.05, df= 27  , both tailed test be:-

( using t distribution table  )

the 95% confidence interval for population mean is :-

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