Question 1

When a large variation of answers is expected, the research should use the following:

Accepted Answer

A)   A large sample
B)   A small sampleC) A) and B)
D) undefined

Question 2

using a large sample corrects for sampling bias.

Accepted Answer

A) True 
 B)False

Question 3

only large samples can identify large group differences.

Accepted Answer

A) True 
 B)False  False

Question 4

Which of the two studies shows diminished returns in terms of increasing precision?

Accepted Answer

A)   By adding 20 individuals to a sample of 500
B)   By adding 20 individuals to a sample of 1,000C) A) and B)
D) undefined B

Question 5

If a rare phenomenon is expected, one should use

Accepted Answer

A)   A small sample
B)   A large sampleC) A) and B)
D) undefined

Question 6

How do statisticians define precision?

Accepted Answer

A)   The extent to which the same results would be obtained if another random sample were drawn from the same population
B)   A sample which shows least sampling error
C)   A large sample size that yields more accuracy of results
D)   The extent to which sampling errors can be evaluated with inferential statisticsE) A) and B)
F) None of the above

Question 7

When a small difference is anticipated, a smaller sample size should be used.

Accepted Answer

A) True 
 B)False  False

Question 8

For a population with very limited variability, which of the following is true?

Accepted Answer

A)   Only a large sample size can yield precise results
B)   A small sample size can yield precise resultsC) A) and B)
D) undefined

Question 9

How does a researcher increase precision?

Accepted Answer

A)   By decreasing the sample size
B)   By using a random sampling method
C)   By increasing the sample size
D)   By using an unbiased sampling methodE) B) and C)
F) A) and D)

Exam 7: Sample Size

When a large variation of answers is expected, the research should use the following:

Correct Answer
verified

using a large sample corrects for sampling bias.

Correct Answer
verified

only large samples can identify large group differences.

Correct Answer
verified
False

Which of the two studies shows diminished returns in terms of increasing precision?

Correct Answer
verified
B

If a rare phenomenon is expected, one should use

Correct Answer
verified

How do statisticians define precision?

Correct Answer
verified

When a small difference is anticipated, a smaller sample size should be used.

Correct Answer
verified
False

For a population with very limited variability, which of the following is true?

Correct Answer
verified

How does a researcher increase precision?

Correct Answer
verified

Exam 7: Sample Size

When a large variation of answers is expected, the research should use the following:

Correct AnswerverifiedShow Answer

using a large sample corrects for sampling bias.

Correct AnswerverifiedShow Answer

only large samples can identify large group differences.

Correct AnswerverifiedFalse

Which of the two studies shows diminished returns in terms of increasing precision?

Correct AnswerverifiedB

If a rare phenomenon is expected, one should use

Correct AnswerverifiedShow Answer

How do statisticians define precision?

Correct AnswerverifiedShow Answer

When a small difference is anticipated, a smaller sample size should be used.

Correct AnswerverifiedFalse

For a population with very limited variability, which of the following is true?

Correct AnswerverifiedShow Answer

How does a researcher increase precision?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
False

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
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False

Correct Answer
verified

Correct Answer
verified