A sample of low-income and high-income individuals was surveyed concerning their opinions on television violence. Those who responded that television violence has become excessive are shown below
Low-Income High-Income
Sample Size 565 680
Believe TV Violence
is Excessive (f) 400 417
1. Calculate the proportion of low-income and high-income people who believe excessive violence is shown on television.
2. Compute the combined sample proportion.
3. What is the standard error of the difference?
4. Translate the difference between proportions into units of the standard error of the difference (standard z value).
5.
1. P - Low-Income = .71, P - High-Income = .61
2. P* = .66
3. .03
4. z = 3.333
5.
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