The following observations are for two quantitative variables, x and y. Observation x y 1 31 26 2 80 21 3 10 81 4 17 80 5 35 71 6 20 60 7 28 82 8 67 23 9 47 62 10 57 58 Observation x y 11 78 34 12 67 41 13 39 35 14 37 60 15 87 23 16 64 40 17 51 30 18 43 65 19 89 24 20 18 88 (a) Develop a crosstabulation for the data, with x as the row variable and y as the column variable. For x use classes of 10–29, 30–49, and so on; for y use classes of 20–39, 40–59, and so on. y Grand Total 20-39 40–59 60–79 80–99 10-29 30–49 X 50–69 70–90 Grand Total (b) Compute the row percentages. (Round your answers to one decimal place.) y Grand Total 20-39 40–59 60–79 80–99 10-29 30–49 X 50–69 70–90 Grand Total (c) Compute the column percentages. (Round your answers to one decimal place.) y Grand Total 20-39 40–59 60–79 80–99 10-29 30–49 X 50–69 70–90 Grand Total

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The following observations are for two quantitative variables, x and y.

Observation	x	y
1	31	26
2	80	21
3	10	81
4	17	80
5	35	71
6	20	60
7	28	82
8	67	23
9	47	62
10	57	58

Observation	x	y
11	78	34
12	67	41
13	39	35
14	37	60
15	87	23
16	64	40
17	51	30
18	43	65
19	89	24
20	18	88

(a)

Develop a crosstabulation for the data, with x as the row variable and y as the column variable. For x use classes of 10–29, 30–49, and so on; for y use classes of 20–39, 40–59, and so on.

			y			Grand Total
		20-39	40–59	60–79	80–99
	10-29
	30–49
X	50–69
	70–90
	Grand Total

(b)

Compute the row percentages. (Round your answers to one decimal place.)

			y			Grand Total
		20-39	40–59	60–79	80–99
	10-29
	30–49
X	50–69
	70–90
	Grand Total

(c)

Compute the column percentages. (Round your answers to one decimal place.)

			y			Grand Total
		20-39	40–59	60–79	80–99
	10-29
	30–49
X	50–69
	70–90
	Grand Total

(d)

What is the relationship, if any, between x and y?

Higher values of x are associated with ---Select--- higher values of y lower values of y . Lower values of x are associated with ---Select--- higher values of y lower values of y .

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