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1. Researches are interested in whether or not the average fuel economy for compact cars is the same as sedan cars. A sample of 36 compact cars and 25 sedan cars is taken. The sample of compacts returns a mean of X = 38 miles per gallon and sample variance of s² = 25. The sample of sedans returns a sample mean Ý 36 with a sample variance of s² = 49. μ2 for sedans. = Let ₁ be the population mean of compacts and a. Create a 95% confidence interval for ₁. b. Now create a 95% confidence interval for μ₁ - ₂. c. Say the interval from part b. contains 0. What can you say about the difference in the average fuel economy of compact cars versus economy cars.

1. Researches are interested in whether or not the average fuel economy for compact cars is the same as sedan cars. A sample of 36 compact cars and 25 sedan cars is taken. The sample of compacts returns a mean of X = 38 miles per gallon and sample variance of s² = 25. The sample of sedans returns a sample mean Ý 36 with a sample variance of s² = 49. μ2 for sedans. = Let ₁ be the population mean of compacts and a. Create a 95% confidence interval for ₁. b. Now create a 95% confidence interval for μ₁ - ₂. c. Say the interval from part b. contains 0. What can you say about the difference in the average fuel economy of compact cars versus economy cars.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 9PPS
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1. Researches are interested in whether or not the average fuel economy for compact cars is the same as sedan cars. A sample of 36 compact cars and 25 sedan cars is taken. = 25. The sample of compacts returns a mean of X = 38 miles per gallon and sample variance of s² 36 with a sample variance of s² = 49. The sample of sedans returns a sample mean Y = Let μ₁ be the population mean of compacts and µ₂ for sedans. a. Create a 95% confidence interval for ₁. b. Now create a 95% confidence interval for μ₁ - ₂. c. Say the interval from part b. contains 0. What can you say about the difference in the average fuel economy of compact cars versus economy cars.
Transcribed Image Text:1. Researches are interested in whether or not the average fuel economy for compact cars is the same as sedan cars. A sample of 36 compact cars and 25 sedan cars is taken. = 25. The sample of compacts returns a mean of X = 38 miles per gallon and sample variance of s² 36 with a sample variance of s² = 49. The sample of sedans returns a sample mean Y = Let μ₁ be the population mean of compacts and µ₂ for sedans. a. Create a 95% confidence interval for ₁. b. Now create a 95% confidence interval for μ₁ - ₂. c. Say the interval from part b. contains 0. What can you say about the difference in the average fuel economy of compact cars versus economy cars.
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