Fuel Economy, SUV ~ The Environmental Protection Agency (EPA) publishes fuel economy values that are known to be good estimates of the fuel economy a typical driver will achieve under average driving conditions. One of the fuel economy values the EPA publishes is a combined estimate, which represents a combination of city driving (55%) and highway driving (45%). A large car rental company has 13 Ford Explorers in their fleet. They collected fuel economy data from these cars and calculated the sample mean to be 24.53 mpg and sample standard deviation as 0.64 mpg. 1. The car rental company is willing to assume that the conditions are met for constructing a confidence interval. Use the collected data to construct a 90% confidence interval for the mean combined fuel economy for Ford Explorers. 2. If the car rental company wants to estimate the mean combined fuel economy at 90% confidence with a margin of error of no more than 0.25 mpg, how large a sample would they need? Use a t* value rounded to three decimal places and the sample information above to calculate your answer. Your answer should be an integer value. n =

Fuel Economy, SUV ~ The Environmental Protection Agency (EPA) publishes fuel economy values that are known to be good estimates of the fuel economy a typical driver will achieve under average driving conditions. One of the fuel economy values the EPA publishes is a combined estimate, which represents a combination of city driving (55%) and highway driving (45%). A large car rental company has 13 Ford Explorers in their fleet. They collected fuel economy data from these cars and calculated the sample mean to be 24.53 mpg and sample standard deviation as 0.64 mpg. 1. The car rental company is willing to assume that the conditions are met for constructing a confidence interval. Use the collected data to construct a 90% confidence interval for the mean combined fuel economy for Ford Explorers. 2. If the car rental company wants to estimate the mean combined fuel economy at 90% confidence with a margin of error of no more than 0.25 mpg, how large a sample would they need? Use a t* value rounded to three decimal places and the sample information above to calculate your answer. Your answer should be an integer value. n =

Name: Fuel Economy, SUV - The Environmental Protection Agency (EPA) publish
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: Fuel Economy, SUV - The Environmental Protection Agency (EPA) publishes fuel economy values that are known to be good estimates of the fueleconomy a typical driver will achieve under average driving conditions. One of the fuel economy values the EPA

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 11PPS

See similar textbooks