Question

A health educator wants to evaluate the effect of a dental film on the frequency with which children brush their teeth. A random selection of 5 children are used for the experiment. First, a baseline of the number of times the children brush their teeth over a month's period is established. Next, the children are shown the dental film and again the number of teeth brushings are recorded for a month. The following data are recorded.   Please analyze this data using a two-tailed test at the α = .05 level.

Participant	Baseline	After Film
1	25	29
2	28	29
3	22	25
4	30	30
5	22	24

What should the researcher conclude given the data?

Answer 1

Run t-Test: Two-Sample Assuming Equal Variances from excel

Results:

P-value = 0.348 (greater than 0.05)

Conclusion:

A p-value higher than 0.05 (> 0.05) is not statistically significant and indicates strong evidence for the null hypothesis. This means we retain the null hypothesis and reject the alternative hypothesis.