Cork price	Metal price	Please, write the final answer for each question (8 Q) in the yellow cells.
16	13	The intermediate answers could be in any other cells in the same worksheet.
10	12	Consider the bottles with a cork stopper as population 1 and the bottles with a metal cap as population 2.
15	16
10	5		Part 2 - 7%, 100 points	1	What is the point estimate?	Show the formula used to calculate it.
17	7		%, Points
11	8		1%,14 points
14	6		Show the formula used to calculate it.
13	10
11	11		1%,14 points	2	Estimate the standard deviation of the difference of the sample means.		Show the formula used to calculate it.
14	9		Show the formula used to calculate it.
11	6
16	16
18	15		1%,14 points	3	Calculate the degrees of freedom.	Show the formula used to calculate it.
16	15		Show the formula used to calculate it.
10	9
17	17
14	6		0.5%, 13 Points	4	State the null and the alternative hypotheses. Is it left-tailed, right tailed or two tailed test? Why?
14	10
16	11				Ho:
7	7				Ha:
10	8
12	11		0.5%, 13 Points	5	Alpha=0.05	Draw a well-labelled diagram showing the rejection and nonrejection regions.
19	22				What is (are) the Critical value (s) ?
15	21
16	11
14	6		1%,14 points	6	Calculate the value of the test statistic.	Show the formula used to calculate it.
9	11		Show the formula used to calculate it.
12	10
21	17
13	12		1%,14 points	7	Make a decision
10	13
16	11
12	16
16	18		1%,14 points	8	The 95% confidence interval is:
13	12
17	11			8.1	Margin of the error			Show the formula used to calculate it.
17	11			8.2	Lower Confidence Limit=		Show the formula used to calculate it.
13	8			8.3	Upper Confidence Limit=		Show the formula used to calculate it.
14	8
18	18
11	5
12	5
15	9
16	10
13	9
18	14
16	8
17	9
12	8
12	7
14	6
9	12
11	12
14	15
19	19
13	4
11	6
17	15
11	9
13	5
15	15
14	9
18	8
18	6
18	7
12	5
10	12
11	4
13	16
14	15
11	6
14	11
18	17
13	7
13	5
19	16
17	13
14	12
17	17
17	17
18	9
19	19
21	19
12	2
15	15
16	5
15	13
10	7
10	11
17	15
12	14
14	9
16	10
12	11
13	6
17	19
17	19
13	10
15	7
12	9
14	10
16	18
15	15
15	16
15	8
12	11
18	13
13	14
12	11
15	7
10	7
13	5
11	7
16	15
14	13
10	6
15	17
14	12
15	12
12	15
16	9
11	13
17	21
16	17
10	5
15	17
11	12
19	14
15	14
20	13