red_pe_ch_10.pdf

# Work with a partner when a sample is selected at

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Work with a partner. When a sample is selected at random, each member of the population is equally likely to be selected. You want to know the favorite extracurricular activity of students at your school. Determine whether each method will result in a random sample. Explain your reasoning. a. You ask members of the school band. b. You publish a survey in the school newspaper. c. You ask every eighth student who enters the school in the morning. d. You ask students in your class. ACTIVITY: Identifying Random Samples 2 A population is an entire group of people or objects. A sample is a part of the population. You can use a sample to make an inference , or conclusion, about a population. Work with a partner. Identify the population and the sample. a. The students in a school The students in a math class b. The grizzly bears with GPS collars in a park c. d. All books in a library 10 fiction books in a library ACTIVITY: Identifying Populations and Samples 1 All quarters in circulation The grizzly bears in a park 150 quarters Identify a population. Select a sample. Interpret the data in the sample. Make an inference about the population. Sample Interpretation Population Inference Probability and Statistics In this lesson, you will determine when samples are representative of populations. use data from random samples to make predictions about populations.

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