Fuel Economy, Minivans - The Environmental Protection Agency (EPA) publishes fuel economy values that are known to be good estimates of the fuel conomy a typical driver will achieve under average driving conditions. One of the fuel economy values the EPA publishes is a combined estimate, vhich represents a combination of city driving (55%) and highway driving (45%). oyota Sienna, a popular minivan, advertises an average combined fuel usage of 22 mpg. A large rental company collected the information about combined fuel economy (mpg) for their 10 Toyota Sienna minivans. The results are shown in the table below. 21.7 21 21.9 20.4 21.8 21.6 22.5 20.8 23.5 21.1 he company calculates the sample mean to be 21.63 and sample standard deviation as 0.897. Round all calculated values to 4 decimal places as appropriate. . The management believes that Toyota has overestimated the fuel economy of the Sienna. Which set of hypotheses should we use to determine if the uel efficiency of the Sienna is less than what is advertised? ОА. Но : и %3D 22 vs. Ha : и # 22 Ов. Но : и %3D 22 vs. Ha : и < 22 ос. Но : и 3D 22 vs. Ha : и> 22
Fuel Economy, Minivans - The Environmental Protection Agency (EPA) publishes fuel economy values that are known to be good estimates of the fuel conomy a typical driver will achieve under average driving conditions. One of the fuel economy values the EPA publishes is a combined estimate, vhich represents a combination of city driving (55%) and highway driving (45%). oyota Sienna, a popular minivan, advertises an average combined fuel usage of 22 mpg. A large rental company collected the information about combined fuel economy (mpg) for their 10 Toyota Sienna minivans. The results are shown in the table below. 21.7 21 21.9 20.4 21.8 21.6 22.5 20.8 23.5 21.1 he company calculates the sample mean to be 21.63 and sample standard deviation as 0.897. Round all calculated values to 4 decimal places as appropriate. . The management believes that Toyota has overestimated the fuel economy of the Sienna. Which set of hypotheses should we use to determine if the uel efficiency of the Sienna is less than what is advertised? ОА. Но : и %3D 22 vs. Ha : и # 22 Ов. Но : и %3D 22 vs. Ha : и < 22 ос. Но : и 3D 22 vs. Ha : и> 22
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 9E
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