(Answered) Confidence interval for the true mean high temperature

Statistics

A climate scientist wishes to estimate the mean high temperature in Jarkarta, Indonesia. She selects a random of 30 days, and records the high temperature; the mean of the sample is 89.7o F, and the standard deviation is s = 6.2oF.

Use this data to construct a 90% confidence interval for the true mean high temperature.

a. 87.39 < μ < 92.01

b. 87.78 < μ < 91.62

c. 86.58 < μ < 92.82

d. 87.79 < μ < 91.61

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