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Statistics for Business
Quiz 2: Describing Data: Numerical
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Question 321
Essay
THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION: The following data represents the number of minutes an athlete spends training per day.
The mean and standard deviation were computed to be 85.54 and 6.97,respectively.The median is 85.5 -What percentage of the measurements actually lie within the interval (71.60,99.48)?
Question 322
Essay
According to the empirical rule,you expect 95% of the measurements to lie within the interval [71.60,99.48] whereas all the given measurements actually lie within this interval.Do your expectations agree with the provided data? If not,what conclusion can be drawn?
Question 323
Essay
Calculate the first,second,and third quartiles of the following sample:
Question 324
Essay
Calculate the location of the 25
th
,50
th
,and 75
th
percentile and their values,using the following data: 0 0 5 7 8 9 12 14 22 33
Question 325
Essay
A company produces flashlight batteries with a mean lifetime of 5,200 hours and a standard deviation of 100 hours. a.Find the z-score for a battery which lasts only 5,100 hours b.Find the z-score for a battery which lasts 5,300 hours