Reference no: EM13338065
The national coffee association conducts an annual wintersurvey of 3, 300 people 10 years of age or older. An articlediscussing this survey indicates that soft drinks have become thenations beverage of choice and that coffee is primarily a breakfastbeverage.
a. The survey indicated that 49% of Americans drankcoffee the previous day as compared to 75% in 1959. Supposethat the the 1959 survey was based on 2,000 respondents. At a0.01 level of significance, is there evidence of a significantdifference between the percentage of americans who drankcoffee in 1999 and the percentage that drank coffee in 1959?
b. Find the p-value in (a) and interpret itsmeaning.
c. The survey indicated that about 23% of 18-to 24 yearolds in the survey drank coffee the previous day as compred to 74%of those over 60 years of age. Suppose there were a 300respondents 18 to 24 years old in the survey and 500 respondentsover 60 years of age. At the 0.01 level of significance, isthere evidence of a significant difference in the percentage of18-to 24 years old and those over 60 years of age who drank coffeethe previous day?
d. Find the p-value in (c) and interpret its meaning.
e. The survey indicated that of meals at home in 1998,35% of breakfast meals, 4% of lunch meals and 3% of supper mealswere serve with coffee. This compared to 40% of breakfastmeals, 9% of lunch meals and 7% supper meals in 1988. Supposethe 1988 survey also was based on 3300 respondents. At a 0.01level of significance, is there evidence of a signficant differencein the proportion of meals served with coffee between 1988 and 1998( Do a seperate analysis for breakfast, lunch and Supper)
f. Find the P-values in (e) and intrepret its meaning.
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: The national coffee association conducts an annual wintersurvey of 3, 300 people 10 years of age or older. An articlediscussing this survey indicates that soft drinks have become thenations beverage of choice and that coffee is primarily a breakfa..
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