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Author Question: A random sample of 100 credit sales in a department store showed an average sale of 120.00 . From ... (Read 75 times)

strangeaffliction

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on: Jun 24, 2018
A random sample of 100 credit sales in a department store showed an average sale of 120.00 . From past data, it is known that the standard deviation of the population is 40.00.
 a. Determine the standard error of the mean.
  b. With a .95 probability, determine the margin of error.
  c. What is the 95 confidence interval of the population mean?

Question 2

George Dantzig is important in the history of management science because he developed
 a. the scientific management revolution.
  b. World War II operations research teams.
  c. the simplex method for linear programming.
  d. powerful digital computers.


TheDev123

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Reply #1 on: Jun 24, 2018
Answer to Question 1

a. 4.00
b. 7.84
c. 112.16 to 127.84

Answer to Question 2

C


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