Worksheet 8-1: Sampling Techniques

In each situation, identify the sample and the population.

• Sample: Mary's science class; Population: all students in her grade.

• Sample: all students in her grade; Population: Mary's science class.

• Sample: Mary's science class; Population: all science classes in the school.

• Sample: all science classes in the school; Population: all students in her grade.

if the 60 mathematics students are not chosen randomly, and only those who are passing their math courses are selected to complete the survey, the statistical data collected by the survey would be ________, and the sample would not be representative of the population.

• biased

• accurate

• random

• complete

Angelo is the manager of a gym. He asks members who are at the gym on Wednesday night if he should have a party for gym members. What type of sampling method is Angelo using?

• Convenience sampling

• Random sampling

• Systematic sampling

• Stratified sampling

Identify the population and the sample.

• Population: The entire group being studied; Sample: A subset of the group.

• Population: A subset of the group; Sample: The entire group being studied.

• Population: The results of the study; Sample: The conclusions drawn.

• Population: The data collected; Sample: The variables measured.

Is the sample representative of the population? If it is representative, explain why. If not, suggest how the sample could be improved.

• Yes, the sample accurately reflects the characteristics of the population.

• No, the sample is too small and does not include enough diversity.

• No, the sample only includes individuals from a single location.

• No, the sample was selected based on convenience rather than randomness.

Identify the sampling technique for each scenario. (a) A mineral water company wants to find out why people choose a particular brand of mineral water. (i) a mail-in response card is attached to the neck of every bottle of mineral water the company sells Fill in the blank: The sampling technique used is ___________.

• Voluntary-Response Sample

• Simple Random Sample

• Stratified Sample

• Systematic Sample

Identify the sampling technique for each scenario. (a) A mineral water company wants to find out why people choose a particular brand of mineral water. (ii) phone every 200th person who mails in a coupon as part of a money-back offer on the purchase of mineral water. Fill in the blank: The sampling technique used is ___________.

• Systematic Sample

• Simple Random Sample

• Stratified Sample

• Convenience Sample

Identify the sampling technique for each scenario. (a) A mineral water company wants to find out why people choose a particular brand of mineral water. (iii) phone 400 numbers chosen randomly from all the residential phone numbers in a province Fill in the blank: The sampling technique used is ___________.

• Simple Random Sample

• Stratified Sample

• Systematic Sample

• Cluster Sample

Identify the sampling technique for each scenario. (a) A mineral water company wants to find out why people choose a particular brand of mineral water. (iv) mail questionnaires to 200 men and 200 women chosen randomly from a list of men and a list of women compiled from a market research company's mailing list Fill in the blank: The sampling technique used is ___________.

• Stratified Random Sample

• Simple Random Sample

• Systematic Sample

• Cluster Sample

Identify the sampling technique for each scenario. (a) A mineral water company wants to find out why people choose a particular brand of mineral water. (v) ask the first 20 people seen carrying mineral water in a park on a summer day Fill in the blank: The sampling technique used is ___________.

• Convenience Sample

• Random Sample

• Systematic Sample

• Stratified Sample