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In: Statistics and Probability

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

In what follows use any of the following tests/procedures: Regression, multiple regressions, confidence intervals, one-sided t-test or two-sided t-test. All the procedures should be done with 5% P-value or 95% confidence interval

Upload CARS data. https://www.limes.one/Content/DataFiles/cars04.txt

SETUP: It is believed that Jaguars’ Highway mileage is different from that of Mercedes. 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. 0.101079174
  • b. 1.443714665
  • c. 0.050539587
  • 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.

Solutions

Expert Solution

5. What test/procedure did you perform?

  • b. Two-sided t-test

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

  • e. None of these

7. Statistical Interpretation

  • b. Since P-value is large we cannot claim that the averages are different.

8. Conclusion

  • b. No, we cannot claim that the above claim is correct.

orchestra answered 2 years ago
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