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A recent survey of 200 households showed that 8 had a single male as the head...

A recent survey of 200 households showed that 8 had a single male as the head of household. Fortyyears ago, a survey of 200 households showed that 6 had a single male as the head of household. Canit be concluded that the proportion has changed? Find the 95% confidence interval of the differenceof the two proportions. Does the confidence interval contain zero? Why is this important to know?

For all confidence intervals, include

a. difference between sample estimates

b. standard error

c. confidence interval

d. state if you can conclude a difference, if so which one is greater

Math   Statistics-And-Probability   
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