need solving process and the steps Questions 31 - 32 The following table shows observations on...
need solving process and the steps
Questions 31 - 32
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
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need solving process and the steps
Questions 31 - 32
The following table shows observations
on...
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