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Q1:
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When a sample does not accurately represent the group
from which it is taken this is called: |
A. a census
B. a biased sample
C. a random sample
D. a population |
Answer 1:
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Q2:
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How often is a CENSUS held in New Zealand? |
A. Every three years
B. Every hundred years
C. Every year
D. Every five years |
Answer 2:
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Q3:
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If a sample is taken and it is not random, any conclusions are likely to be: |
A. very accurate
B. unbiased
C. biased
D. wrong |
Answer 3:
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Q4:
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A sample for a survey on the eating habits of all New Zealanders is taken by selecting every 100th person in the telephone directory. Would this produce a random sample? |
A. No
B. Yes |
Answer 4:
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Q5:
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True or false?
In the Lotto draw, the seven balls chosen form a random sample?
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A. True
B. False |
Answer 5:
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Q6:
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The first 20 people to arrive at work are asked their opinions of the boss! Would the results of this survey be likely to be biased? |
A. No
B. Yes |
Answer 6:
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Q7:
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True or false?
Bias in a survey can be avoided by selecting random samples.
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A. True
B. False |
Answer 7:
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Q8:
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A sample for a survey on the study habits of all students in a secondary school is taken by selecting every 10th person on the school roll. Would this produce a random sample? |
A. No
B. Yes |
Answer 8:
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Q9:
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True or false?
In a random sample every member of the population has the chance of being selected.
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A. True
B. False |
Answer 9:
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Q10:
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A survey which covers every member of a population is called |
A. a random sample
B. a biased sample
C. a census
D. an election |
Answer 10:
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