construct an 80% confidence interval to estimate the population mean when x= 52 and s=14.8 for...

construct an 80% confidence interval to estimate the population mean when x= 52 and s=14.8 for the sample sizes below

a) n=15

b) n=45

c) n=55

Solutions

Expert Solution

a )

52 1.345 ( 14.8 15 )

52 5.1398

( 46.86 , 57.14 )

At 80 %, CI for Mean is ( 46.86 , 57.14 )

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b )

52 1.301 ( 14.8 45 )

52 2.8705

( 49.13 , 54.87 )

At 80 %, CI for Mean is ( 49.13 , 54.87 )

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52 1.297 ( 14.8 55 )

52 2.589

( 49.41 , 54.59 )

At 80 %, CI for Mean is ( 49.41 , 54.59 )

orchestra answered 1 year ago

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