Question

	For Gun Control	Against Gun Control	Total
Females	379	81	460
Males	318	202	520
Totals	697	283	980

(worth up to 20 pts) The above table is the result of a survey randomly selecting females and males to compare the difference in proportions of support for gun control laws.

1. What is the variable of interest being measured?

2. Provide the statistic (with the notation) you will need to perform a confidence interval.

3. Calculate a 95% confidence interval for the difference in females and males proportions of support for gun control.

1. Use STATKEY to perform the calculation.

2. Interpret the results of your confidence interval in context of the problem. Restate your conclusion WITHOUT using statistical terminology (use words that a person without statistics training will understand)?

Answer 1

ANSWER:

(a)

The variable of interest is support for gun control laws.

(b)

The z-statistic would be needed to perform a confidence interval.

(c)

i). The 95% confidence interval for the difference in females and males' proportion of support for gun control is between 0.1579 and 0.2668.

ii). We can say that females support gun control than most males.

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