Green Behavior: Purchasing Habits A recent Harris Poll on green behavior showed that 25% of adults often purchase used items instead of new ones. Consider a random sample of 75 adults. Let p be the sample proportion of adults who often purchase used instead of new items. (a) Is it appropriate to approximate the p distribution with a normal distribu- tion? Explain. (b) What are the values of Mp and o ,?

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28. Green Behavior: Purchasing Habits A recent Harris Poll on green behavior
showed that 25% of adults often purchase used items instead of new ones.
Consider a random sample of 75 adults. Let p be the sample proportion of
adults who often purchase used instead of new items.
(a) Is it appropriate to approximate the p distribution with a normal distribu-
tion? Explain.
(b) What are the values of u, and o ?
Transcribed Image Text:28. Green Behavior: Purchasing Habits A recent Harris Poll on green behavior showed that 25% of adults often purchase used items instead of new ones. Consider a random sample of 75 adults. Let p be the sample proportion of adults who often purchase used instead of new items. (a) Is it appropriate to approximate the p distribution with a normal distribu- tion? Explain. (b) What are the values of u, and o ?
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