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Hypothesis Testing

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

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23
26

23
25
25

24
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27

24
26
26

26
24
30

26
22
27

28
27
32

Solution Preview

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

Regular Mid Grade Super
21 23 26
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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 ...

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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