In what follows use any of the following tests/procedures: Regression, 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.

OpenMathCreditsSalarydata.SETUP: It is believed that the more Math credits the students take during their college years, the higher their salary will be. Given the data your job is to confirm or disprove this assertion.

1. What test/procedure did you perform?

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

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

• a. 1.84409E-24
• b. 9.22043E-25
• c. 0.001661
• d. 3.267165
• e. None of these

3. Statistical interpretation

• a. Since theP-value is very small, we are confident that the average of the first sample is smaller than the other.
• b. Since theP-value is very small, we are very confident that the averages are different.
• c. Since theP-value is very small, we are confident that the slope of regression line is not zero.
• d. We are 95% certain that the confidence interval is [39.98, 46.52].

4. Conclusion

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

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