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Author Question: Explain the difference between the population standard deviation and the sample standard deviation ... (Read 195 times)

V@ndy87

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on: Jul 24, 2018
Explain the difference between the population standard deviation  and the sample standard deviation s.

Question 2

Suppose that amount spent by students on textbooks this semester has approximately a bell-shaped distribution. The mean amount spent was 300 and the standard deviation is 100 . A student spent 500 on textbooks. What percentile does their value correspond to?
 a. 97.5th percentile
  b. 95th percentile
  c. 5th percentile
  d. 2.5th percentile


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rachel

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

The population standard deviation is a measure of spread in the population and is a parameter (fixed value, usually unknown). The sample standard deviation is an estimate of the population standard deviation and is a statistic.

Answer to Question 2

A


V@ndy87

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

shewald78

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Reply 3 on: Yesterday
Wow, this really help

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