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Hypothesis Testing

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A research firm wants to compare the miles per gallon of unleaded regular, mid-grade, and super grades of gasoline. They drive the same car under approximately similar driving conditions and changing out the type of gasoline used. At the .05 significance level, is there a difference in gas mileage for the different types of gas? Write out your null and alternative hypotheses for the problem and state what the finding means practically.

Regular
Mid-Grade
Super

21
23
26

23
25
25

24
24
27

24
26
26

26
24
30

26
22
27

28
27
32

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Solution Summary

Solution describes the steps for testing if there is any difference in gas mileage for the different types of gasoline used.

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Please refer attached file for complete solution. Some of the expressions are missing here.

Regular Mid Grade Super
21 23 26
23 25 25
24 24 27
24 26 26
26 24 30
26 22 27
28 27 32

Ho:(Average mileage is same for all types of gas)
H1:(Average ...

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  • BEng (Hons) , Birla Institute of Technology and Science, India
  • MSc (Hons) , Birla Institute of Technology and Science, India
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