Question

Given the following sample information, test the hypothesis that the treatment means are equal at the 0.10 significance level:

Treatment 1	Treatment 2	Treatment 3
3	9	6
2	6	3
5	5	5
1	6	5
3	8	5
1	5	4
	4	1
	7	5
	6
	4

Question: Find the 95% confidence interval for the difference between treatment 2 and 3. (Round the final answers to 2 decimal places.)

95% confidence interval is: ______ ± __________. 1.75, and 2.12 are incorrect.   

Thank you.

Answer 1

Answer

Using TI 84 calculator

press stat then edit then enter the treatment 2 data in L1 and treatment 3 data in L2

press stat again, then tests then 2-sampTInt

select L1 as List1 and L2 as List 2

C-level = 0.95

Pooled: No

press enter, we get

95% confidence interval =