In what follows use any of the following tests/procedures: Regression, multiple regressions, confidence intervals, one-sided t-test...

Upload CARS data. SETUP: It is believed that Jaguars’ Highway mileage is above 20 mpg. Given the data your job is to confirm or disprove this belief. (CAREFULL: sort the data in order to extract the needed information).

5. What test/procedure did you perform?

a. One-sided t-test
b. Two-sided t-test
c. Regression
d. Confidence interval

6. What is the P-value/margin of error?

a. 0.161902527
b. 1.443714665
c. 6.149555
d. 8.065421
e. None of these

7. Statistical Interpretation

a. Since P-value is very small we are confident that the average mpg is above 20.
b. Since P-value is large we cannot claim that the averages are different.
c. Since P-value is very small we are confident that the slope of regression line is not zero.
d. None of these.

8. Conclusion

a. Yes, I am confident that the above claim is correct.
b. No, we cannot claim that the above claim is correct.

Vehicle Name	Hybrid	SuggestedRetailPrice	DealerCost	EngineSize	Cylinders	Horsepower	CityMPG	HighwayMPG	Weight	WheelBase	Length	Width
Jaguar S-Type 3.0 4dr	0	43895	40004	3	6	235	18	26	3777	115	192	72
Jaguar S-Type 4.2 4dr	0	49995	45556	4.2	8	294	18	28	3874	115	192	72
Jaguar S-Type R 4dr	0	63120	57499	4.2	8	390	17	24	4046	115	192	72
Jaguar Vanden Plas 4dr	0	68995	62846	4.2	8	294	18	28	3803	119	200	73
Jaguar X-Type 2.5 4dr	0	29995	27355	2.5	6	192	18	26	3428	107	184	70
Jaguar X-Type 3.0 4dr	0	33995	30995	3	6	227	18	25	3516	107	184	70
Jaguar XJ8 4dr	0	59995	54656	4.2	8	294	18	28	3803	119	200	73
Jaguar XJR 4dr	0	74995	68306	4.2	8	390	17	24	3948	119	200	73

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Expert Solution

I hope I have made it clear, If you have any doubt please ask in Comment section.

orchestra answered 2 years ago

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