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Author Question: Does regular exercise decrease the risk of cancer? A researcher finds 200 women over 50 who exercise ... (Read 223 times)

hbsimmons88

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Does regular exercise decrease the risk of cancer? A researcher finds 200 women over 50 who exercise regularly, pairs each with a woman who has a similar medical history but does not exercise, then follows subjects for 10 years to see which group
 
  develops more cancer. This is a
  A) survey
  B) prospective study
  C) randomized experiment
  D) retrospective study
  E) matched experiment

Question 2

Which is true about sampling?
 
  I. An attempt to take a census will always result in less bias than sampling.
  II. Sampling error is usually reduced when the sample size is larger.
  III. Sampling error is the result of random variations and is always present.
  A) II and III B) I only C) I, II, and III D) II only E) III only


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vboyd24

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hbsimmons88

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Reply 2 on: Jul 24, 2018
:D TYSM


vickyvicksss

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Reply 3 on: Yesterday
Wow, this really help

 

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