Construct a 95% confidence interval for the population mean, . Assume the population has a normal distribution. A sample of 20 part-time workers had mean annual earnings of $3120 with a standard deviation of $677. Round to the nearest dollar.
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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(11657) · About Me ... 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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