Problem 1

The following table indicates the number of hours slept and the time spent on Facebook of five students on the day before.

Student ID 1 2 3 4 5

TIME SLEPT (HOURS) 8 6 7 7 6

TIME ON FACEBOOK (HOURS

0.5 2 1 0.5 1.5

1. Compute the averages and standard deviations data . interpret your result

2. The correlation coefficient between these two variables is r = 0.8709 . intercept this coefficient in the context of this data .

3. Find the least squars regression line for explaining the time slept by the time spent on facebook interpret .

4. Another student spends 45 minutes on facebook .what is his predicted sleep time ?

5. Calculate the coefficient of determination r2 and more importantly , interpret it .