Q1: 
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: 

Q2: 
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: 

Q3: 
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: 

Q4: 
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: 

Q5: 
True or false?
In the Lotto draw, the seven balls chosen form a random sample?

A. True B. False 
Answer 5: 

Q6: 
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: 

Q7: 
True or false?
Bias in a survey can be avoided by selecting random samples

A. True B. False 
Answer 7: 

Q8: 
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: 

Q9: 
True or false?
In a random sample every member of the population has the chance of being selected.

A. True B. False 
Answer 9: 

Q10: 
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: 
