SOLUTION: A total of 15 children who had fluoride treatment were compared with 15 that did not. of those who used fluoride the mean number of cavities was .8 with s1 equaling .07. for those

Click here to see ALL problems on Probability-and-statistics

Question 117183: A total of 15 children who had fluoride treatment were compared with 15 that did not. of those who used fluoride the mean number of cavities was .8 with s1 equaling .07. for those who did not use fluoride was 1.4 with s2 equaling .09. test the hypothesis that there is no difference between these two groups of children at the .05 significance level, and show all work supporting your conclusion and the method you used.
Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
A total of 15 children who had fluoride treatment were compared with 15 that did not. of those who used fluoride the mean number of cavities was .8 with s1 equaling .07. for those who did not use fluoride was 1.4 with s2 equaling .09. test the hypothesis that there is no difference between these two groups of children at the .05 significance level, and show all work supporting your conclusion and the method you used.
-------------
Ho: u1-u2=0
Ha: u1-u2 is not 0 (Claim)
Use 2-Sample T Test
Test Statistic:
t=-2.3144 (Not Pooled)
p-value = 0.0361
Conclusion: Reject Ho because p is less than 5%
Conclusion: The test fails to support the claim that there is no difference
between the occurrence of cavities in children who do or do not use floride.
=============
Cheers,
Stan H.