In what follows use any of the following tests/procedures: Regression, confidenc
ID: 3066060 • Letter: I
Question
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. Open the PreLaw_Nursing data. SETUP: The data contain the salaries for 25 people whose college majors were either Pre-law or Nursing. Question: Do these two majors have different salaries? 9. What test/procedure did you perform? a. One-sided t-test b. Two-sided t-test c. Regression d. Confidence interval 10. What is the P-value/margin of error? a. 0.000629 b. 1.889037 c. 1.500706 d. 0.528567 e. None of these 11. Statistical interpretation a. The 95% confidence interval is [35.95, 39.72]. b. The 95% confidence interval is [40.85, 43.86]. c. Since the P-value is too large, we cannot claim that there is connection between two variables. d. Since the P-value is small, we can claim that there is connection between two variables. e. None of these. 12. Conclusion a. Yes, I am confident that the salaries are different. b. No, I cannot claim that the salaries are different. DATA:PreLaw Nursing 46 38 33 42 33 42 41 41 31 42 41 43 41 43 34 51 44 41 40 37 39 45 32 43 29 39 36 44 43 41 31 46 34 35 39 47 42 48 34 47 39 38 42 38 38 39 45 44 39 45
Explanation / Answer
9. What test/procedure did you perform?
-----> b. Two-sided t-test
Because here we want find these two majors have different salaries that why we need use two sided sample T-test here .
10. What is the P-value/margin of error?
-------> a. 0.000629
Using Minitab
One-Sample T: PreLaw/Nursing
Test of = 0 vs 0
Variable N Mean StDev SE Mean 95% CI T P-Value
PreLaw/Nursing 50 40.100 4.875 0.689 (38.715, 41.485) 58.16 0.000
11. Statistical interpretation a
d. Since the P-value is small, we can claim that there is connection between two variables
12. Conclusion
a. Yes, I am confident that the salaries are different.
Because here P-value is less than 0.05 so we reject the null hypothsis but we accept the alternative hypothesis .
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