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Author Question: If the sample size for a poll increases from 100 people to 400 people, the margin of error a. ... (Read 150 times)

maychende

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on: Jul 24, 2018
If the sample size for a poll increases from 100 people to 400 people, the margin of error
 a. increases by a factor of 4, i.e. is multiplied by 4.
  b. increases by a factor of 2, i.e. is multiplied by 2.
  c. decreases by a factor of , i.e. is multiplied by .
  d. decreases by a factor of , i.e. is multiplied by .

Question 2

A random sample of 1,002 adults aged at least 18 years and living in the 48 contiguous states (i.e. any state in the United States excluding Alaska and Hawaii) was conducted by the Gallup Organization. The interviews were done over the telephone. The population represented by this sample was
 a. all adult Americans in the 48 contiguous states living in a household with a phone.
  b. all adult Americans living in the same cities as people who were actually sampled.
  c. all adult Americans.
  d. all Americans.


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djpooyouma

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

C

Answer to Question 2

A


maychende

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Reply #2 on: Jul 24, 2018
Both answers were spot on, thank you once again


djpooyouma

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Reply #3 on: Jul 24, 2018
Great! Please up vote :D


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