Questions from Business Statistics

Q: A typical incoming telephone call to your catalog sales force results in

A typical incoming telephone call to your catalog sales force results in a mean order of $28.63 with a standard deviation of $13.91. You may assume that orders are received independently of one anothe...

Q: Your customers’ average order size is $2,601, with

Your customers’ average order size is $2,601, with a standard deviation of $1,275. You are wondering what would happen if exactly 45 typical customers independently placed orders tomorrow. a.* Find th...

Q: Which of the following samples is likely to be the most representative

Which of the following samples is likely to be the most representative of the population of all employees at IBM? a. The 10 oldest and most experienced researchers at the Thomas J. Watson Research Cen...

Q: The sample average age is 69.8 and the sample standard

The sample average age is 69.8 and the sample standard deviation is 9.2, based on a sample of 200 individuals in a retirement community. Your friend claims that “the sample average is approximately 9....

Q: Find the standard error of the average for the following data set

Find the standard error of the average for the following data set representing quality of agricultural produce: 16:7,17:9,23:5,13:8,15:9,15:2,12:9,15:7

Q: A random sample of 50 recent patient records at a clinic shows

A random sample of 50 recent patient records at a clinic shows that the average billing per visit was $53.01 and the standard deviation was $16.48. a.* Find the standard error of the average and inter...

Q: Find the average and the standard error for the amounts that your

Find the average and the standard error for the amounts that your regular customers spent on your products last month, viewing the data from problem 2 of Chapter 4 as a sample of customer orders. Dat...

Q: Find the average and the standard error for the strength of cotton

Find the average and the standard error for the strength of cotton yarn used in a weaving factory, based on the data in problem 23 of Chapter 4. Data from problem 23: Consider the strength of cotton...

Q: Find the average and the standard error for the weight of candy

Find the average and the standard error for the weight of candy bars before intervention, based on the data in Table 5.4 of Chapter 5. Table 5.5.4:

Q: A survey of 823 randomly selected adults in the United States finds

A survey of 823 randomly selected adults in the United States finds that 63% support current government policies. Find the usual measure that indicates approximately how far this sample percentage is...