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Chapter 1: Q 1.15 (page 31)
1.15 From Table 1.13, find the percentage of rainfall that is between 6.99 and 13.05 inches.
Percentage of rainfall between 6.99 and 13.05 inches is 64%.
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For the following exercises, identify the type of data that would be used to describe a response (quantitative discrete, quantitative continuous, or qualitative), and give an example of the data. time in line to buy groceries.
A 鈥渞andom survey鈥� was conducted of people of the 鈥渕icroprocessor generation鈥� (people born since , the year the microprocessor was invented). It was reported that 48% of those individuals surveyed stated that if they had to spend, they would use it for computer equipment. Also, of those surveyed considered themselves relatively savvy computer users.
a. Do you consider the sample size large enough for a study of this type? Why or why not?
b. Based on your 鈥済ut feeling,鈥� do you believe the percents accurately reflect the U.S. population for those individuals born since ? If not, do you think the percents of the population are actually higher or lower than the sample statistics? Why? Additional information: The survey, reported by Intel Corporation, was filled out by individuals who visited the Los Angeles Convention Center to see the Smithsonian Institute's road show called 鈥淎merica鈥檚 Smithsonian.鈥�
c. With this additional information, do you feel that all demographic and ethnic groups were equally represented at the event? Why or why not?
d. With the additional information, comment on how accurately you think the sample statistics reflect the population parameters
Tableshows the amount, in inches, of annual rainfall in a sample of towns.
From the table , find the percentage of rainfall that is less than inches.
Is a sample of 500 volunteers a reliable measure for a population of 2,500?
A local radio station has a fan base of listeners. The station wants to know if its audience would prefer
More music or more talk shows. Asking all listeners is an almost impossible task.
The station uses convenience sampling and surveys the first people they meet at one of the station鈥檚 music concert events. people said they鈥檇 prefer more talk shows, and 176 people said they鈥檇 prefer more music.
Do you think that this sample is representative of (or is characteristic of) the entire listener population?
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