You look at the relationship between how much time people spend on the website ‘Bookface’ and how productive they are at work.

Question

time spent on Bookface is the predictor variable, and time spent working is the response variable.
correlation between minutes spent on Bookface and minutes spent working is -0.5.

The standard deviation in Bookface time is 4.86, and the standard deviation of time spent working is 3.50.

You want to find the values for the equation ŷi=a+bxi. What is the value of the slope?

I worked the equation as the the
following -

-0.5(4.86/3.50) - 1.38857 but I got this wrong I wanted to know where in the formula I had went wrong for future learning. As I am lost about the equation and the slope
Can anyone help explain this to me.

Answer 1

I am confused I want to find the values of the equation of Yi=a + bxi.
Time spent on twitter is the predictor variable and time spent working on twitter is the response
The correlation between minutes spent on twitter and minutes spent working is -0.5
The standard deviation in Twitter time is 4.86 and the standard deviation of time spent working is 3.50

I tried the following -0.5(4.86/3.50) or 4.86/3.50*-0.5 but not sure if correct way. Any one help explain this to me please.