Q1) Suppose we know that differences in job satisfaction scores follow Normal distribution with standard deviation σ=60. Sample of 75 workers had mean response x= 17.If there is no difference in job satisfaction between 2 work environments, mean is μ=0. This is H0. Alternative hypothesis says merely "there is a difference," Ha: μ ≠ 0. Find out the test statistics and its two-sided P-value. Do data give good evidence that population mean is not zero?
Following sample observations were randomly selected.
|
X:
|
5
|
3
|
6
|
3
|
4
|
4
|
6
|
8
|
|
Y:
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13
|
15
|
7
|
12
|
13
|
11
|
9
|
5
|
Find out regression equation.
Find out value of Y' when X is 7.