It has been hypothesized that students who exercised at least 3 days per week do better in school than student who exercise less than that. To test this, Dr. ney separated her students into 2 groups—those who exercised 3 or more days per week (Group A) and those who exercised less than that (Group B). She gave them all a 10 point quiz covering hypothesis testing. The data are listed below. Do these data indicate a significant difference between the scores at the .05 level of significance? Group A Group B 7 3 6 9 10 7 8 6 4 8 Group A Group B Total na= nb= Xa = Xb = Ma= Mb = SSa = SSb = dfa= dfb= State the hypotheses in symbols and words Find the critical value of t. First find appropriate df. For this test it is df1 + df2 = _____________________ The critical value of t = ___________________ Calculate t The Calculated value of t = ____________________ Which t- is larger? Do not consider the + or = signs. __________________ If the critical value of t is smaller than the calculated value, you will DECIDE to reject the Null hypothesis and CONCLUDE that there is a difference between the means and the treatment made a difference. Make decision State conclusion
It has been hypothesized that students who exercised at least 3 days per week do better in school than student who exercise less than that. To test this, Dr. ney separated her students into 2 groups—those who exercised 3 or more days per week (Group A) and those who exercised less than that (Group B). She gave them all a 10 point quiz covering hypothesis testing. The data are listed below. Do these data indicate a significant difference between the scores at the .05 level of significance?
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Group A |
Group B |
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7 |
3 |
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6 |
9 |
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10 |
7 |
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8 |
6 |
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4 |
8 |
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Group A |
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Group B |
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Total |
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na= |
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nb= |
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Xa = |
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Xb = |
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Ma= |
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Mb = |
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SSa = |
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SSb = |
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dfa= |
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dfb= |
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State the hypotheses in symbols and words
Find the critical value of t. First find appropriate df.
For this test it is df1 + df2 = _____________________
The critical value of t = ___________________
Calculate t
The Calculated value of t = ____________________
Which t- is larger? Do not consider the + or = signs. __________________
If the critical value of t is smaller than the calculated value, you will DECIDE to reject the Null hypothesis and CONCLUDE that there is a difference between the means and the treatment made a difference.
Make decision
State conclusion
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