The scores on a placement test given to college freshmen for the past five years are approximately normally distributed with a mean µ = 74 and a variance σ 2 = 8. would you still consider σ 2= 8 to be a valid value of the variance if a random sample of 20 students who take the placement test this year obtain a value of s 2 = 20?

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%

The graph shows the charges for a health club in a month. make a function table for the input-output values. writes an equation that can be used to find the total charge y for the number of x classes

With alll of except for the 2 that i did already