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A health educator wants to evaluate the effect of a dental film on the frequency with...

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 is the standard error for the test statistic?

Math   Statistics-And-Probability   
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Answer #1

Applying matched pair study":

Standard error of estimate = 0.7071

(since p value <0.05 we reject null hypothesis)

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