(a)  Do you think that the percentage of all American movie-goers who think the popcorn is overpriced is equal to 12%?  Explain. (b)  If the sample size was increased to 10,000 American movie-goers, what effect would this have on the estimated percentage of American movie-goers who think the popcorn is overpriced?   (c)  A local movie theatre manager wants to know how his customers feel about the price of the popcorn so he asks the first 100 customers who get in line at the concession stand on a Saturday night if they think the popcorn is overpriced.  Explain why the manager’s results may be biased and how he could fix this.

4.  A recent poll found that 12% of a random sample of 25 American movie-goers thought the popcorn sold at the movie theatre was overpriced.  

(a)  Do you think that the percentage of all American movie-goers who think the popcorn is overpriced is equal to 12%?  Explain.

(b)  If the sample size was increased to 10,000 American movie-goers, what effect would this have on the estimated percentage of American movie-goers who think the popcorn is overpriced?  

(c)  A local movie theatre manager wants to know how his customers feel about the price of the popcorn so he asks the first 100 customers who get in line at the concession stand on a Saturday night if they think the popcorn is overpriced.  Explain why the manager’s results may be biased and how he could fix this.

 

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