1.) 5 students were given an English test before and after receiving instruction on basic grammar. Their scores are as follows:
Student Before After
a 20 20
b 14 22
c 13 18
d 14 17
e 12 16
a) Calculate and appropriate t-test using those data. Based on your results, is it reasonable top conclude that future students would show higher scores after instruction? Why /why not?
b) Calculate the effect size as well as the confidence interval for the results in part a). What do these mean?
test stat:t =3.06
reject Ho since p-value < .05
Conclusion: Future students would show higher scores after instruction.
I am confused on your confidence intervals. Would the Tcrit of be equivalent to 2.132 and not 2.776 like you have derived. This is a one tailed test correct? I got for the CI@95% (1.223, 6.777)
Yes, this is a one tailed test, but confidence interval is not one-tailed.
Silly mistake on my behalf. thank you for the clarification!
Content will be erased after question is completed.
Enter the email address associated with your account, and we will email you a link to reset your password.
Forgot your password?