Jake keeps a log of the distance he covers, in miles, on each of his daily running workouts. Over the past twelve months, he has recorded a large number of workouts. Jake randomly selected 10 workouts from his log and found a mean distance of 4.81 miles with a standard deviation of 2.05 miles. Assuming all conditions for inference are met, which of the following gives a 90% confidence interval to estimate the mean number of miles he ran in the past twelve months? (A) 4.81 ± 1.645(0.648) (B) 4.81 ± 1.81(0.648) (C) 4.81 ± 1.81(2.05) (D) 4.81 1.83(0.648) ± (E) 4.81 ± 1.83(2.05)

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