Question

According to a survey of the top 10 employers in a major city in the Midwest, a worker spends an average of 413 minutes a day on the job. Suppose the standard deviation is 26.8 minutes, and the time spent is approximately a normal distribution.
What are the times within which approximately 68.26 percent of all workers will fall?
A. [394.8, 431.2]
B. [386.2, 439.8]
C. [372.8, 453.2]
D. [359.4, 466.6]
E. [332.6, 493.4]

Answer

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