The following table shows observations on women’s weekly working hours and her number of kids.

Weekly working hours	Number of kids
40	0
35	1
0	2
20	2
30	0

Use the population version of variance and covariance formulas to answer the following questions.

Q31 Determine the covariance between the variables.

(a) -3.4

(b) -0.47

(c) -10

(d) -2.4

(e) -1.9

Answer (c) -10

Q32 Suppose that the standard deviations for the variables are 14.14 and 0.89. Determine the correlation coefficient

(a) -0.1327

(b) -0.7946

(c) 0.5187

(d) -0.9183

(e) -0.3971

Answer (b) -0.7946

Answer rating: 100% (QA)

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