Agroup of 463 first-year college students were asked, “about how many hours do you study during a typical week? ” the mean response is 15.3 hours. assume that the study time is normally distributed with a sample standard deviation of 8.5 hours. construct a 99% confidence level interval for the mean study time of all first-year students.

The table below shows the height of a ball  x  seconds after being kicked.  what values, rounded to the nearest whole number, complete the quadratic regression equation that models the data? f(x)  =  x2  +  x  +  0based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?   feet

Measures of the angle of r, 31 s (x+4) t (3x+9)

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old