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# FTCE Math: Sampling in Statistics Chapter Exam

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#### Question 1 1. A researcher is studying a population, and decides to use simple random sampling. Why might they have made this decision?

#### Question 2 2. A statistician calculates the probability of an event in an experiment. After a dozen trials of the experiment, the statistician finds that the theoretical probability and the experimental probability differ. What is the likely reason for this?

#### Question 3 3. When members belong to multiple groups in the population this is called _____. Cluster sampling _____ have this.

#### Question 4 4. A political group invites people in the local communities to participate in a survey about prayer in schools. This is an example of:

#### Question 5 5. A _____ is a part of a population used to describe the whole group.

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#### Question 6 6. Which of the following is a type of random sampling?

#### Question 7 7. You should use cluster sampling when the clusters are _____ in a population.

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Question 8
8.
Jackie is conducting a survey. Her population contains 100 people with strata divided into the following proportions:

20%, 10%, 10%, 30%, 30%

If Jackie wants to select 10 people for her sample, then how many people from each stratum would she pick?

#### Question 9 9. In a survey, people on average responded that they floss seven times a week despite the fact that the actual averages are drastically lower. Which form of bias likely accounts for this discrepancy?

#### Question 10 10. Which theorem states that the larger the sample size, the closer the sample mean will be to the mean of the population?

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#### Question 11 11. The law of large numbers is also known as:

#### Question 12 12. To use systematic random sampling, you must first create a list of your population, and then:

#### Question 13 13. _____ is a sampling method where different groups within a population are used as a sample.

#### Question 14 14. What is a part of a population used to describe the whole group?

#### Question 15 15. Why is systematic random sampling unbiased?

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#### Question 16 16. When selecting strata groups, it is recommended you have:

#### Question 17 17. A(n) _____ is all members of a specified group.

#### Question 18 18. According to the law of large numbers, the difference between the theoretical probability and the experimental probability becomes _____ as more experiments are performed, or as the sample size gets larger.

#### Question 19 19. Which is a sampling method that involves separating the population into clusters, and then selecting random samples from each of the clusters?

#### Question 20 20. What is the name for all the members of a specified group?

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#### Question 21 21. Which type of random sampling divides members of a population into homogeneous subgroups?

#### Question 22 22. What is a type of random sampling where the variables have an equal, and unsystematic, chance of selection?

#### Question 23 23. Why is it important to avoid a non-representative sample when conducting a survey?

#### Question 24 24. What are a sequence of equally distributed variables?

#### Question 25 25. How do cluster sampling and stratified random sampling differ?

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#### Question 26 26. To find the interval you need, take your population divide by the _____.

#### Question 27 27. The law of large numbers shows a relationship between the theoretical probability and the _____.

#### Question 28 28. A survey is handed out by loud volunteers on a street corner. Some people are suspicious of the volunteers and choose to not participate in the survey. This is an example of:

#### Question 29 29. Which of the following conditions must be met for a sample to be a stratified random sample?

#### Question 30 30. For which type of study is it most appropriate to use a random sample?

#### FTCE Math: Sampling in Statistics Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!