The mall has a set of data with employee age (X) and the corresponding number of
ID: 3436879 • Letter: T
Question
The mall has a set of data with employee age (X) and the corresponding number of annual on-the-job-accidents(Y). Analysis on the set finds that the regression equation is Y=100-3X. What is the likely number of accidents for someone aged 30?
97
100
10
The null hypothesis is rejected if the p value is:
>5
<5
<.05
>-5%
consider the following regression equation between Y and X:
Y = 4.622X -100
Selected this equation shows a positive correlation between X and Y
this equation shows a negative correlation between X and Y
The regression equation cannot provide information about the type of correlation that exists between the two variable.
Explanation / Answer
Y = 100-3x
Plug in 30 for age x
y = 100-90 =
10
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The null hypothesis is rejected if the p value is:<.05
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this equation shows a positive correlation between X and Y
as slope is positive.
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