*****CHOICES UNDER \"CONCLUSION\" ARE REJECT OR DO NOT REJECT *****CHOICES UNDER

Question

*****CHOICES UNDER "CONCLUSION" ARE REJECT OR DO NOT REJECT

*****CHOICES UNDER "SIGNIFICANCE LEVEL" ARE 1% 5% 10% 90% 95% 99%


PLEASE PROVIDE EXPLANATION, SO I CAN GAIN AN UNDERSTANDING OF HOW TO SOLVE THE PROBLEM

Chapter 4, Section 5, Exercise 149 Hypotheses for a statistical test are given, followed by several possible confidence intervals for different samples. In each case, use the confidence interval to state a conclusion of the test for that sample, and give the significance level used. In addition, in each case for which the results are significant, state which group (1 or 2 ) has the larger mean. Hypotheses: Ho: 1 = 2 vs Ha: 1+ 2 (a) 95% confidence interval for 1-2 : 0.17 to 0.45 Conclusion Ho Significance level: L Group with the larger mean: (b) 99% confidence interval for 1-2: -2.6 to 5.2 Conclusion Significance level: Group with the larger mean: L (c) 90% confidence interval for 1-2: -10.6 to-3.8 t.3 Conclusion: Ho Significance level: Group with the larger mean: L Question Attempts: 0 of 4 used

Explanation / Answer

a) Since the confidence interval contains only positive values and doesn't include 0, we reject Ho.

The confidence interval is 95% so the significance level = (100 - 95)% = 5%

Since the difference is positive, group 1 has the larger mean.

Proceeeding in a similar manner for other two parts:

b) Do not reject

1%

You can leave this blank because the results are not significant.

c) Reject

10%

Group 2

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