Author Question: Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible ... (Read 46 times)

craiczarry · **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 · **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

craiczarry · **Reply #2 on:** Jun 24, 2018

Correct answers!

Mholman93 · **Reply #3 on:** Jun 24, 2018

Great! Please up vote

Author Question: Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible ... (Read 46 times)

craiczarry

Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible ...

Mholman93

Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible ...

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craiczarry

Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible ...

Mholman93

Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible ...