Chapter 1: Q 1.16 (page 32)
1.16 From Table 1.13, find the number of towns that have rainfall between 2.95 and 9.01 inches
Short Answer
The percentage of rainfall between 2.95 and 9.01 inches is 28.
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Chapter 1: Q 1.16 (page 32)
1.16 From Table 1.13, find the number of towns that have rainfall between 2.95 and 9.01 inches
The percentage of rainfall between 2.95 and 9.01 inches is 28.
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A study was done to determine the age, number of times per week, and the duration (amount of time) of residents using a local park in San Antonio, Texas. The first house in the neighborhood around the park was selected randomly, and then the resident of every eighth house in the neighborhood around the park was interviewed.
鈥淒uration (amount of time)鈥 is what type of data?
a. qualitative(categorical); b. quantitative discrete; c. quantitative continuous
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. brand of toothpaste
YouPolls is a website that allows anyone to create and respond to polls. One question posted April asks:
鈥淒o you feel happy paying your taxes when members of the Obama administration are allowed to ignore their tax liabilities?鈥
As of April people responded to this question. Each participant answered 鈥淣O!鈥
Which of the potential problems with samples discussed in this module could explain this connection?
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. age of executives in Fortune 500 companies
Name the sampling method used in each of the following situations:
a. A woman in the airport is handing out questionnaires to travelers asking them to evaluate the airport鈥檚 service. She does not ask travelers who are hurrying through the airport with their hands full of luggage, but instead asks all travelers who are sitting near gates and not taking naps while they wait.
b. A teacher wants to know if her students are doing homework, so she randomly selects rows two and five and then calls on all students in row two and all students in row five to present the solutions to homework problems to the class.
c. The marketing manager for an electronics chain store wants information about the ages of its customers. Over the next two weeks, at each store location, randomly selected customers are given questionnaires to fill out asking for information about age, as well as about other variables of interest.
d. The librarian at a public library wants to determine what proportion of the library users are children. The librarian has a tally sheet on which she marks whether books are checked out by an adult or a child. She records this data for every fourth patron who checks out books.
e. A political party wants to know the reaction of voters to a debate between the candidates. The day after the debate, the party鈥檚 polling staff calls randomly selected phone numbers. If a registered voter answers the phone or is available to come to the phone, that registered voter is asked whom he or she intends to vote for and whether the debate changed his or her opinion of the candidates.
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