The graph shows a scatter plot and line of the best fit relating the ages of children and the total number of times they have visited the doctor. use the line of best fit to estimate the age of a child who has visited the doctor 40 times. a. 14 years old b. 11 years old c. 12 years old d. 13 years old

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)