PSYCHOLOGY 315

Psychology 315



Psychology 315

Problem No. 14

Ho: Mean is equal to 24

HA: Mean is not equal to 24

as, n = 8, then

t (25) = (25 - 24) / (1.1952/ sqrt (8)) = 2.366

p- value = 2P (t > 2.366 with df = 7) = 2 x 0.024 = 0.049 or 4.9 %

After the above calculation, it can be said that the p- value is less than 5 percent; therefore, we can reject the null hypothesis.

Problem No. 18

Ho: Means are equal for control and experimental groups

HA: Means are not equal for control and experimental groups

n1 = 20 (experimental group cases)

n2 = ...