1)This burger place hypothesizes that greater than 45% of existing customers intend to purchase the Godzilla Burger.In a survey of 245 customers, 47% said that they intend to purchase the new burger.Is this burger places's hypothesis supported?

2)this company has two seperate products that are similar but sold under two different names and wants to know if the quality is perceived differently between the two brand names.In a survey of current customers of each brand, they ask respondents to rate the brand on a 1 to 10 scale where 1 is very low quality and 10 is very high quality. For the 175 customers of Turn surveyed, the average rating was 8.2 with a standard deviation of 1.4.For the 125 customers of Twist surveyed, the average rating was 7.2 with a standard deviation of 2.0. Using a 95% confidence level, are these brands viewed as different quality?

3) 375 attendees of a baseball game were asked to participate in a short survey as they were leaving the baseball stadium. 200 of the survey participants were college graduates and 175 were non-college graduates. In the survey they were asked whether they owned a tablet computer or not.The results of the survey revealed that, 31 percent of the college graduates own a tablet computer and 29 percent of the non-college graduates own a tablet computer. Is the hypothesis supported?Do more college graduates own a tablet computer than non-college graduates?

4)This lady is wondering if she should enter her new product into the market. A recent survey of a random sample of 250 households in that market showed a mean household income of $32,000 with a standard deviation of $1,500.On the basis of past experience and of comprehensive studies in current market areas, she believes the product line will be profitable only in markets where the mean household income (across all households) is greater than $30,000.Should she introduce the product line into the new market?

5)A researcher is proposing a survey for an are Boys and Girls Club that is contemplating adding a preschool activity center. If the preschool center is built, all 4,000 members would see a 5% increase in member fees. The purpose of the survey would be to measure member attitudes toward the preschool center. There is one question on the survey that the YMCA researcher feels is most important to the research objective:

If a preschool activity center was built at the Boys and Girls Club how frequently would you use it?

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Not at allAll the time

The researcher conducted a pilot test with twenty Boys and Girls Club members. The standard deviation for the most important question was 2.15. If the manager wants a +/- .20 error and a 95% confidence level, what sample size should be used in this case?