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 = .05 level.

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

What is the null hypothesis for this study?

What are the degrees of freedom for the test statistic?

What is the standard error for the test statistic?

What should the researcher conclude given the data?

Does Cohen's d for the study above represent a small, medium, or large effect?