SOLUTION: 1. A researcher would like to compare the effectiveness of video versus reading for communicating information to adolescents. A sample of n1= 10 adolescents is given a pamphlet exp

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Question 1070392: 1. A researcher would like to compare the effectiveness of video versus reading for communicating information to adolescents. A sample of n1= 10 adolescents is given a pamphlet explaining nuclear energy and told that they will be tested on the information. A separate sample of n2= 10 adolescents is shown a video that contains the same information presented in a fast-paced visual form and told that they will be tested. One week later all 20 subjects are given a test on nuclear energy. The average score for the pamphlet group was sample mean 1= 51 with s 12= 16. The video group averaged sample mean2= 46 with s 22= 20. Conduct a t-Test (two-tail, α = .05) for two Independent groups to see if there is a significant difference between the two groups (follow the Handout).

Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website!
mu1=51
mu2=46
s1^2=16
s2^2=20
n1=n2=10
Do a 2-sample t
hypothesize means =
alpha=0.05
test stat t d=18 0.975
critical value |t|>2.101
t df (18)=(mu1-mu2)/sqrt ((s1^2/n1)+(s2^2/n2))
=5/sqrt [(16/10)+(20/10)]
=5/sqrt (3.6)
=2.635
This is greater than the critical value of 2.101.
Reject Ho and there is significant difference that the two means are different.