A gallon of chlorine is put into a swimming pool. Each hour later for the following 6 hours the percent of chlorine that remains in the pool is measured. The following information is obtained.

(a) Determine the correlation coefficient for the time and the percent of chlorine remaining.

(b) Determine whether a correlation exists at α = 0.01.

(c) Determine the equation of the line of best fit for the time and the amount of chlorine remaining.

(d) Use the equation in part (c) to estimate the average amount of chlorine remaining after 4.5 hr.

Round both m and b the nearest hundredth.

Transcribed Image Text:

1 2 3 4 5 Time (hours) Chlorine remaining (percent) 80.0 76.2 68.7 50.1 30.2 20.8