## Investigations Test

Unit Test #44

Select your answers to the following 10 questions from the pop-up menus in the right hand column. Clicking the "Begin Test Again" button will clear all the answers.

 Q1: When a sample does not accurately represent the group from which it is taken this is called: A. a censusB. a biased sampleC. a random sampleD. a population Answer 1: A                    B                    C                    D Q2: How often is a CENSUS held in New Zealand? A. Every three yearsB. Every hundred yearsC. Every yearD. Every five years Answer 2: A                    B                    C                    D Q3: If a sample is taken and it is not random, any conclusions are likely to be: A. very accurateB. unbiased C. biasedD. wrong Answer 3: A                    B                    C                    D 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: A                    B                    C                    D Q5: True or false? In the Lotto draw, the seven balls chosen form a random sample? A. TrueB. False Answer 5: A                    B                    C                    D 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. NoB. Yes Answer 6: A                    B                    C                    D Q7: True or false? Bias in a survey can be avoided by selecting random samples. A. TrueB. False Answer 7: A                    B                    C                    D 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. NoB. Yes Answer 8: A                    B                    C                    D Q9: True or false? In a random sample every member of the population has the chance of being selected. A. TrueB. False Answer 9: A                    B                    C                    D Q10: A survey which covers every member of a population is called A. a random sampleB. a biased sampleC. a censusD. an election Answer 10: A                    B                    C                    D