Question

1. An article presented data on green liquor Na2S concentration (grams per liter), and paper machine production (in tons per day). The data are given below:

Green Liquor	Paper Machine
Concentration	Production
825	40
830	42
890	49
895	46
890	44
910	48
915	46
960	43
990	53
1010	52
1012	54
1030	57
1050	58

1. Write down the null and alternative hypotheses to test if the slope β is significantly greater than 0.05. Test the hypotheses using an appropriate confidence interval. Interpret the test result.

2. Write down the null and alternative hypotheses to test if the slope β is significantly lesser than 0.1. Test the hypotheses using an appropriate confidence interval. Interpret the test result.

3. Write down the null and alternative hypotheses to test if the slope β is significantly greater than 0.1. Test the hypotheses using an appropriate confidence interval. Interpret the test result.

Answer 1