solve. 1. a survey of high school students showed that 63% of students planned to take college...

Solve.

1. A survey of high school students showed that 63% of students planned to

take college courses after graduation. Predict how many of the 837 students

surveyed plan to take college courses.

2. According to a survey, 73% of adults 21–30 years old own at least one car.

For a city with about 24,600 adults aged 21–30 years, predict how many own

a car.

3. 832 families were asked if they ate dinner together at least 4 nights of the

week. If 62% of the families said yes, predict how many families eat dinner

together at least 4 nights of the week.

4. In a lumberyard, about 13% of its total stored wood is lost to water damage

each year. If the lumberyard stores 250 tons of wood each year, predict how

much is lost to water damage.Course 2, Lesson 10-2

Course 2, Lesson 10-2

ANSWERS

1. 527

2. 17,958

3. 516

4. 32.5 tons

HOW do you know which type of graph to use

when displaying data?

Statistics and Probability


Course 2, Lesson 10-2 Common Core State Standards © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.


• 7.SP.1Understand 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.

• 7.SP.2Use data from a random sample to draw inferences about a population with an unknown characteristic of interest. Generate multiple samples (or simulated samples) of the same size to gauge the variation in estimates or predictions.

Course 2, Lesson 10-2 Common Core State Standards © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.


Mathematical Practices1 Make sense of problems and persevere in solving them.3 Construct viable arguments and critique the reasoning of others.4 Model with mathematics.5 Use appropriate tools strategically.

•To determine if a sample is biased or unbiased•To use sampling to make a prediction





•unbiased sample•simple random sample•systematic random sample•biased sample•convenience sample•voluntary response sample

How did what you learned today help you answer the




GeometryStatistics and Probability

How did what you learned today help you answer the




GeometryStatistics and Probability

Sample answers:• When determining if a conclusion is valid based upon

the sampling method used• When using a valid sampling to make a prediction in a

real-world context

Name one type of biasedsample and explain the bias.


Ratios and Proportional Relationships

FunctionsStatistics and Probability

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