1. The following data represent the digital-mode talk time in hours and the battery capacity in milliampere-hours of cellphones:
   1. Compute the coefficient of correlation r.

TALK TIME BATTERY TALK TIME BATTERY

CAPACITY CAPACITY

4.5 800 1.5 450

4.00 1500 2.25 900

3.00 1300 2.25 900

2.00 1550 3.25 900

2.75 900 2.25 7OO

1.75 875 2.25 800

1.75 750 2.50 800

2.25 1100 2.25 900

1.75 850 2.00 900

1. What conclusion can you reach about the relationship between the battery capacity and the digital-mode talk time?
2. You would expect the cellphones with higher battery capacity to have a higher talk time. Is this borne out of the data?