Mathematics, 21.04.2020 00:52 Kittylover65
Two major automobile manufacturers have produced compact cars with engines of the same size. We are interested in determining whether or not there is a significant difference in the mean MPG (miles per gallon) when testing for the fuel efficiency of these two brands of automobiles. A random sample of eight cars from each manufacturer is selected, and eight drivers are selected to drive each automobile for a specified distance. The following data (in miles per gallon) show the results of the test. Assume the population of differences is normally distributed.
Driver Manufacturer A Manufacturer B
1 32 28
2 27 22
3 26 27
4 26 24
5 25 24
6 29 25
7 31 28
8 25 27
A) The mean for the differences is a. 0.50b. 1.5c. 2.0d. 2.5B) The test statistic is a. 1.645b. 1.96c. 2.096d. 2.256
C) At 90% confidence the null hypothesis a. should not be rejectedb. should be rejectedc. should be revisedd. None of these alternatives is correct
Answers: 3
Mathematics, 21.06.2019 21:00, VictoriaRose520
Evaluate this using ! 0.25^2 x 2.4 + 0.25 x 2.4^2 − 0.25 x 2.4 x 0.65
Answers: 1
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