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Determine whether the conclusion is valid. Justify your answer. 1. To decide what main dish to serve at her wedding, Jeanne asks 50 of her friends and.

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Presentation on theme: "Determine whether the conclusion is valid. Justify your answer. 1. To decide what main dish to serve at her wedding, Jeanne asks 50 of her friends and."— Presentation transcript:

1 Determine whether the conclusion is valid. Justify your answer. 1. To decide what main dish to serve at her wedding, Jeanne asks 50 of her friends and family whether they prefer fish or chicken. Of these, 60% choose chicken. She concludes that she will serve chicken at the wedding. 2. To determine the percentage of vacation time employees take, a company randomly selects 50 employee records from the company's database. What type of sample is used in this experiment? Course 2, Lesson 10-3

2 ANSWERS 1. The conclusion is valid. Because the people she surveyed will be attending her wedding, they are representative of the entire population of guests. 2. Simple random sampling

3 HOW do you know which type of graph to use when displaying data? Statistics and Probability Course 2, Lesson 10-3

4 Course 2, Lesson 10-3 Common Core State Standards © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved. Statistics and Probability Extension of 7.SP.1 Understand that statistics can be used to gain information about a population by examining a sample of the population; generalizations about a population from a sample are valid only if the sample is representative of that population. Understand that random sampling tends to produce representative samples and support valid inferences. Mathematical Practices 1Make sense of problems and persevere in solving them. 3Construct viable arguments and critique the reasoning of others. 4Model with mathematics.

5 To identify a misleading graph To explain how statistics might be misleading Course 2, Lesson 10-3 Statistics and Probability

6 How did what you learned today help you answer the HOW do you know which type of graph to use when displaying data? Course 2, Lesson 10-3 Geometry Statistics and Probability

7 How did what you learned today help you answer the HOW do you know which type of graph to use when displaying data? Course 2, Lesson 10-3 Geometry Statistics and Probability Sample answers: When the graph of real-life data might be misleading When understanding how statistics can be used to influence conclusions

8 List some of the things you should look for when determining whether a graph or statistical measure is misleading. Course 2, Lesson 10-3 Ratios and Proportional RelationshipsFunctions Statistics and Probability

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