Construct a​ 95% confidence interval for the population mean muμ. Assume the population has a Normal distribution. A sample of 20 college students had mean annual earnings ​ $3,120 with a standard deviation of​ $677. A.​$3125 ​+ or minus​ $234 B.​$2151 ​+​ or minus $216 C.​$3120 ​+ or minus​ $317 D.​$3120 ​+​ or minus $594

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Construct a​ 95% confidence interval for the population mean
mu
μ. Assume the population has a Normal distribution. A sample of 20 college students had mean annual earnings ​ $3,120 with a standard deviation of​ $677.

A.
​$3125 ​+ or minus​ $234

B.
​$2151 ​+​ or minus $216

C.
​$3120 ​+ or minus​ $317

D.
​$3120 ​+​ or minus $594

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