Seatbelts Safety Officials Hope a Public Information Campaign Will Increase

question 71

Essay

Seatbelts Safety officials hope a public information campaign will increase the use of seatbelts above the current 70% level. Their efforts include running radio and TV ads, putting up billboards, having police officers appear on talk shows, and getting newspapers to indicate whether people injured in accidents were belted in. After several months they check the effectiveness of this campaign with a statewide survey of 560 randomly chosen drivers. 407 of those drivers report that they wear a seatbelt.
a. Verify that a Normal model is a good approximation for the binomial model in this situation.
b. Does the survey result suggest that the education/advertising campaign was effective? Explain.

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Definitions:

Informational Influence

The process through which individuals change their behavior or beliefs based on the information or evidence presented by others, especially in uncertain situations.

Autokinetic Effect

A visual illusion where a small, stationary point of light in a dark environment appears to move because of involuntary eye movements.

Informational Influence

A social influence that leads individuals to accept information from others as evidence about reality, often leading to internalization or private acceptance.

Low-Ball Technique

Influence technique based on commitment, in which one first gets a person to comply with a seemingly low-cost request and only later reveals hidden additional costs.