Online T-test calculator assignment
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Class Period *
Your last name: *
Your first name: *
Is this the first or second time doing this assignment? *
Write your question.
What question do you want to answer using the grade data?  What two groups do you want to compare?
Write the null hypothesis.
Write a possible research hypothesis.
This is a prediction about the relationships that you want to test.  ex: I think that boys are smarter than girls, thus I predict a significant difference between the boys' and girls' grades.
What is the mean of each group?
Before you answer this question or the rest, you will need to paste in the data and let the computer do the work.
What is the standard deviation of each group?
What is "n" for each group?
note: when using an online calculator the size of the groups does not have to be the same.
Degrees of freedom?
T value?
P value
note:  only p-values less than 5% (.05) show statistical significant.  Thus if you have a p value greater than .05 you have failed to reject the null.
Write a statement about weather you can reject the null hypothesis or not.
ex:  I can reject my null hypothesis that there is no difference between....
Write a statement about the statistical significance of your results.
ex:  "Even though classes before lunch performed better on the final exam, the differences were not statistically significant.  Thus I can't make a conclusion about the effect of lunch on final exam performance."
Check the box below when you are done with all of the questions and are ready to submit this form. *
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