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Author Question: Explain why Chebyshev's theorem cannot be used for one standard deviation from the ... (Read 43 times)

viki

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on: Jun 24, 2018
Explain why Chebyshev's theorem cannot be used for one standard deviation from the mean.

Question 2

A random sample of 81 credit sales in a department store showed an average sale of 68.00 . From past data, it is known that the standard deviation of the population is 27.00.
 a. Determine the standard error of the mean.
  b. With a .95 probability, what can be said about the size of the margin of error?
  c. What is the 95 confidence interval of the population mean?


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JaynaD87

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

Chebyshev's Theorem requires an input value of at least 2, since an input of 1 would cause a divide by 0 error.

Answer to Question 2

a. 3.0
b. There is a .95 probability that the sample mean will provide a margin of error of 5.88 or less.
c. 62.12 to 73.88


viki

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Reply 2 on: Jun 24, 2018
Great answer, keep it coming :)

dyrone

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Reply 3 on: Yesterday
Gracias!

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