The following sample data represent the time (in minutes) required by business executives to complete an expense report. Determine the inter-quartile range on these data and comment on what itmeans.
Answer to relevant QuestionsAccording to Chebyshev’s theorem, at least what proportion of the data will be within µ ± kσ for each value of k?a. k = 2b. k = 2.5c. k = 1.6d. k = 3.2Some numbers are not normally distributed. If the mean of the numbers is 38 and the standard deviation is 6, what proportion of values would fall between 26 and 50? What proportion of values would fall between 14 and 62? ...Determine the sample variance and standard deviation for the following data by using the computational formula. Class ......... f5–under 9 ........ 209–under 13 ........ 1813–under 17 ........ 817–under 21 ...The 2010 U.S. Census also asked for each person’s age. Suppose that a sample of 40 households taken from the census data showed the age of the first person recorded on the census form to be as follows.According to the U.S. Army Corps of Engineers, the top 20 U.S. ports, ranked by total tonnage (in million tons), were as follows.Port .............. Total TonnageSouth Louisiana, LA ....... 229.0Houston, TX ...
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