According to a Survey of the Top 10 Employers in a Major

Multiple Choice

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 that approximately 68.26% 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]