Calculate the covariance between variables X and Y. Is it a positive or negative relationship between...

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Statistics

Calculate the covariance between variables X and Y. Is it apositive or negative relationship between the two variables?
b. Calculate correlation coefficient between X and Y. Is it apositive or negative relationship? Is it a strong linear, weaklinear or nonlinear relationship between X and Y?
c. Use the Y data to calculate mean, range, standard deviationand variance.
d. Use the first Y value to calculate the Z-score. Is it anoutlier?
e. Calculate the 60th percentile for the Y data.
1 -22 22
2 -33 49
3 2 8
4 29 -16
5 -13 10
6 21 -28
7 -13 27
8 -23 35
9 14 -5
10 3 -3
11 -37 48
12 34 -29
13 9 -18
14 -33 31
15 20 -16
16 -3 14
17 -15 18
18 12 17
19 -20 -11
20 -7 -22

Answer & Explanation Solved by verified expert

3.8 Ratings (698 Votes)

Let us first calculate the covariance between X and Y This iscalculated with the formulawhere are means of x and y valuesFirst we form a table as below for further See Answer

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1	-22	22
2	-33	49
3	2	8
4	29	-16
5	-13	10
6	21	-28
7	-13	27
8	-23	35
9	14	-5
10	3	-3
11	-37	48
12	34	-29
13	9	-18
14	-33	31
15	20	-16
16	-3	14
17	-15	18
18	12	17
19	-20	-11
20	-7	-22

1	-22	22
2	-33	49
3	2	8
4	29	-16
5	-13	10
6	21	-28
7	-13	27
8	-23	35
9	14	-5
10	3	-3
11	-37	48
12	34	-29
13	9	-18
14	-33	31
15	20	-16
16	-3	14
17	-15	18
18	12	17
19	-20	-11
20	-7	-22