Would be plez i really need ! 10

a young sumo wrestler decided to go on a special diet to gain weight rapidly. he gained weight at a constant rate.
the table compares the wrestler's weight (in kilograms) and the time since he started his diet (in months).

time(months) - weight(kilograms)
0.5 80.6
2 88.4
3.5 96.2

what was the wrestler's weight before he went on his diet?

kilograms

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.