In a survey conducted by Wright State University, senior high school students were asked if they had ever used marijuana. The table shows results of one analysis, where X is the count who said yes. Assuming these observations can be treated as a random sample from a population of interest,
a. Interpret the reported estimate and the reported confidence interval. Explain how to interpret the fact that 0 is not in the confidence interval.
b. Explain how the confidence interval would change if males were Group 1 and females were Group 2. Express an interpretation for the interval in that case.

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Sample 1. Female 445 2. Male 515 1156 estimate for p ()p (2) 95% CI for p(1) p(2): (-0.0887,-0.0077) Sample p 0.3973 0.4455 0.0482 1120