Bob the Dentist wants to test his hypothesis that the average number of dental cavities of children will be lower for those who grew up drinking fluoride in their water versus those who did not have fluoride in their water. Test to see if Group 1 with fluoride had fewer cavities than Group 2 with no fluoride. Use alpha .05. Write down the data and show work on paper but type in your answers below in the spaces indicated. {Use 3 decimal places for critical value - use a whole number or 1 decimal if it comes out that way - when you need to round use 2 decimal places. Include negative sign when needed - no extra spaces or leading zero pls] Fluoride No Fluoride 1 3 1 2 3 4 2 5 3 5 2 5 What is the critical value of this t-test with alpha = .05? use 3 decimal places for critical value - can include negative sign Group 1: M1= SS1 = Group 2: M2 = SS2 = pooled var = SEM or sM-M = use 3 decimals here t-value = use 2 decimals here Is the difference significant? answer with 1 word yes or no What is the effect size using Cohen's d? d =
Bob the Dentist wants to test his hypothesis that the average number of dental cavities of children will be lower for those who grew up drinking fluoride in their water versus those who did not have fluoride in their water. Test to see if Group 1 with fluoride had fewer cavities than Group 2 with no fluoride. Use alpha .05. Write down the data and show work on paper but type in your answers below in the spaces indicated. {Use 3 decimal places for critical value - use a whole number or 1 decimal if it comes out that way - when you need to round use 2 decimal places. Include negative sign when needed - no extra spaces or leading zero pls]
Fluoride No Fluoride
1 3
1 2
3 4
2 5
3 5
2 5
What is the critical value of this t-test with alpha = .05? use 3 decimal places for critical value - can include negative sign
Group 1: M1= SS1 =
Group 2: M2 = SS2 =
pooled var =
SEM or sM-M = use 3 decimals here
t-value = use 2 decimals here
Is the difference significant? answer with 1 word yes or no
What is the effect size using Cohen's d? d =
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