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Slide 1-,*,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Slide 4-,*,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Slide 4-,*,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Slide 4-,*,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Slide 4-,*,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Slide 4-,*,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Slide 6-,*,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Slide 6-,*,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Slide 6-,*,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Slide 6-,*,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Slide 6-,*,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Slide 4-,1,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Active Learning Lecture Slides,For use with Classroom Response Systems,Elementary Statistics:,Picturing,the World,Fourth Edition,by Larson and Farber,Chapter 6:Confidence Intervals,Slide 6-,2,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,A random sample of 42 textbooks has a mean price of$114.50 and a standard deviation of$12.30.,Find a point estimate for the mean price of all textbooks.,$42,$12.30,$114.50,$2.73,Slide 6-,3,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,A random sample of 42 textbooks has a mean price of$114.50 and a standard deviation of$12.30.,Find a point estimate for the mean price of all textbooks.,$42,$12.30,$114.50,$2.73,Slide 6-,4,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Find the critical value,z,c,necessary to form a 98%confidence interval.,2.33,2.05,0.5040,0.8365,Slide 6-,5,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Find the critical value,z,c,necessary to form a 98%confidence interval.,2.33,2.05,0.5040,0.8365,Slide 6-,6,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,A random sample of 42 textbooks has a mean price of$114.50 and a standard deviation of$12.30.,Find a 98%confidence interval for the mean price of all textbooks.,(111.38,117.62),(110.08,118.92),(110.78,118.22),(109.61,119.39),Slide 6-,7,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,A random sample of 42 textbooks has a mean price of$114.50 and a standard deviation of$12.30.,Find a 98%confidence interval for the mean price of all textbooks.,(111.38,117.62),(110.08,118.92),(110.78,118.22),(109.61,119.39),Slide 6-,8,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Determine the minimum sample size needed to construct a 95%confidence interval for the mean age of employees at a company.The estimate must be accurate to within 0.5 year.Assume the standard deviation is 4.8 years.,18,19,354,355,Slide 6-,9,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Determine the minimum sample size needed to construct a 95%confidence interval for the mean age of employees at a company.The estimate must be accurate to within 0.5 year.Assume the standard deviation is 4.8 years.,18,19,354,355,Slide 6-,10,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Find the critical value,t,c,necessary to form a 95%confidence interval with a sample size of 15.,1.960,2.145,2.131,2.120,Slide 6-,11,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,Find the critical value,t,c,necessary to form a 95%confidence interval with a sample size of 15.,1.960,2.145,2.131,2.120,Slide 6-,12,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,A random sample of 15 DVD players has a mean price of$64.30 and a standard deviation of$5.60.,Find a 95%confidence interval for the mean price of all DVD players.,(61.20,67.40),(61.47,67.13),(61.22,67.38),(61.10,67.51),Slide 6-,13,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,A random sample of 15 DVD players has a mean price of$64.30 and a standard deviation of$5.60.,Find a 95%confidence interval for the mean price of all DVD players.,(61.20,67.40),(61.47,67.13),(61.22,67.38),(61.10,67.51),Slide 6-,14,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,In a survey of 250 Internet users,195 have high-speed Internet access at home.,Find a point estimate for the proportion of all Internet users who have high-speed Internet access at home.,1.28,0.78,0.22,195,Slide 6-,15,Copyright 2007 Pearson Education,Inc.Publishing as Pearson Addison-Wesley,In a survey of 250 Internet users,195 have high-speed Internet access at home.,Find a point estimate for the proportion of all Internet users who have high-speed Internet access at home.,1.28,0.78,0.22,195,Slide 6-,16,Copyright 2007 Pearson Education,Inc.Publis
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