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Author Question: Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible ... (Read 90 times)

craiczarry

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on: Jun 24, 2018
Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible selections are there?
 a. 20
  b. 7
  c. 5
  d. 10

Question 2

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?


Mholman93

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

d

Answer to Question 2

a. 4
b. 7.84
c. 112.16 to 127.84


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craiczarry

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Reply #2 on: Jun 24, 2018
Correct answers!


Mholman93

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Reply #3 on: Jun 24, 2018
Great! Please up vote :D


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