A city council wants to know whether residents of one neighborhood tend to use city parks more often than residents of another neighborhood. After sampling both popula- tions, they find that of 24 residents from neighborhood A, the average number of trips to a park per year was 14, with a standard deviation of 4. For 18 residents in neighbor- hood B, the average number of trips was 18, with a standard deviation of 8.
a. Find a 99% confidence interval for the difference in park trips per year, assuming that
the sample variances are not necessarily equal.
Assuming that the variances are not equal, we find
b. Find a 95% confidence interval assuming that the variances are equal.
Assuming that the variances _are_ equal, we find
A. 
B. 
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Indicate whether this statement is true or false.
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a. True b. False Indicate whether the statement is true or false
What is the difference between party regulars and candidate activists?
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