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, 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.
-Within which interval will the times of approximately 68.26% of all workers 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]