Astatistics professor has observed that for several years students score an average of 107points out of 150 on the semester exam. a salesman suggests that he try a statistics software package that gets students more involved withcomputers, predicting that it will increase students' scores. the software is expensive, and the salesman offers to let the professor use it for a semester to see if the scores on the final exam increase significantly. the professor will have to pay for the software only if he chooses to continue using it. in the trial course that used this software, 217 students scored an average of 110 points on the final with a standard deviation of 8.8 points.
what is test statistics? (t= )
does this improvement seem to be practicallysignificant?
determine the 95% confidence interval for the mean score using the software, rounding to one decimal place.
( , )

answer: a) (0,0), (1,1), (2,8), and (3,27).

step-by-step explanation:

0^3=0

1^3=1

2^3=8

3^3=27

in effect, the exponential equation for this would me y=3^x. each x-coordinate cubed is giving the y coordinate, so a is your answer : )

it is only things thain can be deafeated

step-by-step explanation:

delaney would like to make a 5lb nut mixture that is 60% peanuts and 40% almonds.

she has several pounds of peanuts and several pounds of a mixture that is 20% peanuts and 80% almonds.

let 'p' represent the number of pounds of peanuts needed to make the new mixture, and  

let 'm' represent the number of pounds of the 80% almond-20% peanut mixture.

:

p + m = 5

therefore

m = (5-p)

write an equation based on the percent of peanuts

1p + .2m = .6(5)

replace m with (5-p)

p + .2(5-p) = .6(5)

p + 1 - .2p = 3

p - .2p = 3 - 1

.8p = 2

p = 2/.8

p = 2.5 lbs of peanuts required

then

5 - 2.5 = 2.5 lbs of the peanut/almond mixture required

:

a) what is the system that models this situation?

p + m = 5

1p + .2m = .6(5)