SOLUTION: Construct a 95% confidence interval for the population mean, μ. Assume the population has a normal distribution. A sample of 20 college students had mean annual earnings of $3
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Question 1129237: Construct a 95% confidence interval for the population mean, μ. Assume the population has a normal distribution. A sample of 20 college students had mean annual earnings of $3120 with a standard deviation of $677.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
t-test with df=19; t=2.093
half-interval is t*s/sqrt(n)=+/-2.093*677/sqrt(20)=313.84
($2806.16, $3433.84)
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