Fifteen participants take a pretest and a posttest and have a mean change score of 1.5. the standard deviation of the comparison distribution is 0.5, what is the t score?

here t score is 3

Step-by-step explanation:

given data

total number n = 15

mean µ = 1.5

standard deviation SD = 0.5

to find out

the t score

solution

we know mean and SD

so t score will be by given formula that is

t score = mean / SD       1

put here value mean and SD in equation 1

t score = 1.5 / 0.5

t score = 3

so here t score is 3

answer: i believe c. is the answer sorry if i am wrong

step-by-step explanation:

complete the steps to find the area of the trapezoid.

area of rectangle = 256   square units

area of triangle 1 = 24  square units

area of triangle 2 = 16  square units

area of triangle 3 =   96 square units

area of trapezoid = 120  square units

step-by-step explanation: