The table and scatterplot shows this time spent watching TV, X, and the time spent doing homework, Y by each of nine students last week. The equation of the line of best fit is why equals -0.2 X +19.36 Use the equation of the line of best fit to fill in the blanks below give exact answers not rounded approximations.

Arandom sample of 15 observations is used to estimate the population mean. the sample mean and the standard deviation are calculated as 172 and 63, respectively. assume that the population is normally distributed. a. with 99 confidence, what is the margin of error for the estimation of the population mean? b. construct the 99% confidence interval for the population mean. c. construct the 95% confidence interval for the population mean. d. construct the 83% confidence interval for the population mean. hint: you need to use excel function =t.inv.2t to find the value of t for the interval calculation.