A Health Educator Wants to Evaluate the Effect of a Dental

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. Using a = 0.05 2 tail , what do you conclude?

A) retain H 0 ; the film has no effect on the frequency of tooth brushing
B) reject H 0 ; the film affects the frequency of tooth brushing
C) accept H 0 ; the film has no effect on the frequency of tooth brushing
D) reject H 0 ; chance alone is a reasonable explanation of the data