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7th Grade Chapter 8 R.pdf - Lesson 8.1 Cumulative Practice...

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Copyright © Big Ideas Learning, LLCBig Ideas Math: Modeling Real Life Grade 7All rights reserved.Resources by Chapter2691.A scale drawing of a square has a side length of 7 millimeters. The drawinghas a scale of 1 mm : 9 km. Find the actual perimeter and area of the square.2.A scale drawing of a square has a side length of 5 centimeters. The drawinghas a scale of 1 cm : 2 ft. Find the actual perimeter and area of the square.1.Write what you know about this phrase.Preview: biased sampleWrite and solve a proportion to answer the question.1.What percent of 18 is 1.8?2.50 is 125% of what number?Lesson8.1Cumulative PracticeFor use before Lesson 8.1Lesson8.1Vocabulary PracticeFor use before Lesson 8.1Lesson8.1Prerequisite Skills PracticeFor use before Lesson 8.1
Big Ideas Math: Modeling Real Life Grade 7Copyright © Big Ideas Learning, LLCResources by ChapterAll rights reserved.270Name _________________________________________________________ Date _________Identify the population and the sample.1.All students in a school2.75 strawberries in a field30 students in the schoolAll the strawberries in the fieldDetermine whether the sample isbiasedorunbiased. Explain.3.You want to estimate the number of students in your school who are on athleticteams outside of school. You survey members of your school’s athletic teams.4.You want to estimate the number of students in your school who think there shouldbe healthier school lunches available. You ask every 5th person waiting in the cafeterialunch line.Which sample is better for making an estimate? Explain.5.6.Determine whether you would survey the population or a sample. Explain.7.You want to know the average weight of the members of your family.8.You want to know the number of grocery stores in Florida that carry yourfavorite cereal.9.A survey asked 60 randomly chosen students if they eat school lunch. Fortysaid yes. There were 560 school lunches sold today. Estimate the number ofstudents who attend the school.10.You survey 25 randomly chosen college students fromyour local college to name their dietary preference. Thereare 4000 students at the college. Estimate the number ofstudents at the college who prefer a vegetarian diet.Estimate the number of residents in St. Lucie County who own a home.Sample AA random sample of 100 residents in the countySample BA random sample of 100 residents in the city of Fort PierceEstimate the number of people at a beach who are wearing sunscreen.Sample AA random sample of 50 people at the beachSample BA random sample of 5 people at the beachLesson8.1Extra Practice

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