According to Chebyshev\'s Theorem, a range of how many standard deviations would

Question

According to Chebyshev's Theorem, a range of how many standard deviations would include at least 90 percent of the values? A. 2.2 B. 3.0 C. 2.1 D. 3.16 E. 4.22 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 standard deviation is 26.8 minutes, and the time spent is approximately a normal distribution. According to Chebyshev's Theorem, at least what proportion of the data will be within for k = 2 In a Five-Number summary, the two ends of the summary are: A. The mean and the median B. The minimum and the maximum C. The mean and the standard deviation D. The first quartile and the third quartile

Explanation / Answer

1) here (!-1/k2)=0.9

k=3.16

hence option d is correct

2)% =(1-1/k2)*100 =(1-1/22)*100 =75%

option D

3)option B is correct

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