Multiple Choice
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 8 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. 
The obtained value of the appropriate statistic is _________.
A) 3.13
B) 3.14
C) 3.58
D) 3.57
Correct Answer:
Verified
Correct Answer:
Verified
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