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 99.73% of all workers will fall?
A)[305.8 520.2]
B)[386.2 439.8]
C)[372.8 453.2]
D)[359.4 466.6]
E)[332.6 493.4]

Question

Quizplus · Accepted Answer

99.73% of data in a normal distribution falls within three standard deviations from the mean. The mean is 413 minutes, and the standard deviation is 26.8 minutes. So, the range is 413 ± 3(26.8), which is [332.6, 493.4].

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