Use the standard deviation values of the two samples to find the standard deviation of the sample mean differences.
Sample Standard Deviation
Red box 3.868
Blue box 2.933
Then complete each statement.
The sample size of the session regarding the number of people would purchase the red box,
Ni, is
a)63
b)48
c)45
d)60
The sample size of the session regarding the number of people would purchase the blue
box, N2, is
a)45
b)48
c)63
d)60
The standard deviation of the sample mean differences is approximately
a) 0.53
b)0.72
c)0.62
d)0.69

Evaluate the following expression 1/3^2

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?