Unit 3 & 4 Assignment Solutions

Unit 3 & 4 Assignment Solutions - Unit 3 & 4...

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1. (a) (i) simple random sample (ii) There is no bias involved with the sampling method. (b) (i) voluntary response sample (ii) Only people who feel strongly about the issue will take the time to respond. The sample will therefore not be representative of the population. (c) (i) multistage random sample (ii) There is no bias involved with the sampling method. (d) (i) convenience sample (ii) The sample may not be representative of the population. The representative is more likely to ask friendly-looking people who don’t seem to be in a rush. He or she also may tend to select certain types of people to ask (perhaps more females than males, for example). (e) (i) stratified random sample (ii) There is no bias involved with the sampling method. (f) In this situation, the multistage sample makes the most sense. The simple random sample and stratified random sample would be very time-consuming and probably not practical. It would be much more difficult to contact students one-by-one than to administer a survey to an entire class. 2.
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Unit 3 & 4 Assignment Solutions - Unit 3 & 4...

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