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Author Question: Stratified random sampling is a method of selecting a sample in which _____. a. the sample is first ... (Read 222 times)

tuffie

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on: Jun 24, 2018
Stratified random sampling is a method of selecting a sample in which _____.
 a. the sample is first divided into strata, and then random samples are taken from each stratum
  b. various strata are selected from the sample
  c. the population is first divided into strata, and then random samples are drawn from each stratum
  d. None of the answers is correct.

Question 2

The value of the standard deviation may be either positive or negative, while the value of the variance will always be positive.
  Indicate whether the statement is true or false


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lorealeza77

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

c

Answer to Question 2

F


tuffie

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Reply #2 on: Jun 24, 2018
Thank you


lorealeza77

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Reply #3 on: Jun 24, 2018
No problemo


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