...States.? In 1995, 9208 motorcycles were reported stolen; 2406 of these were Harleys. We can think of motorcycles stolen in 1995 as an SRS of motorcycles stolen in recent years.
(a) If Harleys made up 19% of motorcycles stolen, what would be the sampling distribution of the proportion of Harleys in a sample of 9208 stolen motorcycles?
p= ?
standard deviation =?
4. One-sample procedures for proportions, like those for means, are used to analyze data from matched pairs designs. Here is an example.
Each of 54 subjects tastes two unmarked cups of coffee and says which he or she prefers. One cup in each pair contains instant coffee; the other, fresh-brewed coffee. 30 of the subjects prefer the fresh-brewed coffee. Take p to be the proportion of the population who would prefer fresh-brewed coffee in a blind tasting.
(a) Test the claim that a majority of people prefer the taste of fresh-brewed coffee. Is your result significant at the 5% level? What is your practical conclusion?
z-score= ?
p-value = ?
(a) If Harleys made up 19% of motorcycles stolen, what would be the sampling distribution of the proportion of Harleys in a sample of 9208 stolen motorcycles?
p= ?
standard deviation =?
4. One-sample procedures for proportions, like those for means, are used to analyze data from matched pairs designs. Here is an example.
Each of 54 subjects tastes two unmarked cups of coffee and says which he or she prefers. One cup in each pair contains instant coffee; the other, fresh-brewed coffee. 30 of the subjects prefer the fresh-brewed coffee. Take p to be the proportion of the population who would prefer fresh-brewed coffee in a blind tasting.
(a) Test the claim that a majority of people prefer the taste of fresh-brewed coffee. Is your result significant at the 5% level? What is your practical conclusion?
z-score= ?
p-value = ?