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Author Question: The price of a particular brand of jeans has a mean of 37.99 and a standard deviation of 7 . A ... (Read 95 times)

Mr. Wonderful

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on: Jun 24, 2018
The price of a particular brand of jeans has a mean of 37.99 and a standard deviation of 7 . A sample of 49 pairs of jeans is selected. Use Excel to answer the following questions:
 a. What is the probability that the sample of jeans will have a mean price less than 40?
  b. What is the probability that the sample of jeans will have a mean price between 38 and 39?
  c. What is the probability that the sample of jeans will have a mean price within 3 of the population mean?

Question 2

The standard deviation of a standard normal distribution _____.
 a. is always equal to 0
  b. is always equal to 1
  c. can be any positive value
  d. can be any value


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skipfourms123

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

a. .97778
=NORM.DIST(40,37.99,1,TRUE)
b. .339763
=NORM.DIST(39,37.99,1,TRUE)  NORM.DIST(38,37,99,1,TRUE)
c. .9973
=NORM.DIST(40.99,37.99,1,TRUE)  NORM.DIST(34.99,37.99,1,TRUE)

Answer to Question 2

b


Mr. Wonderful

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Reply 2 on: Jun 24, 2018
Gracias!

kjohnson

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Reply 3 on: Yesterday
Wow, this really help

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