Question Details

MAT 130 MODULE 1 CHECK YOUR UNDERSTANDING

1.	Identify the type of observational study (cross-sectional, retrospective, prospective). The Nielsen Media Research Company uses people meters to record the viewing habits of about 5000 households, and today those meters will be used to determine the proportion of households tuned to CBS Evening News.

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2.	Identify which of these types of sampling is used: random, stratified, systematic, cluster, convenience. In a study of college programs, 820 students are randomly selected from those majoring in communications, 1463 students are randomly selected from those majoring in business, and 760 students are randomly selected from those majoring in history.

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3.	Determine what completes the following definition: _____ occurs in an experiment when you are not able to distinguish among the effects of different factors.

4.	Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. The subjects in which college students major.

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5.	Identify the type of observational study (cross-sectional, retrospective, prospective). A town obtains current employment data by polling 10,000 of its citizens this month.
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6.	Identify which of these types of sampling is used: random, stratified, systematic, cluster, convenience. The author was an observer at a Town of Poughkeepsie Police sobriety checkpoint at which every fifth driver was stopped and interviewed. (He witnessed the arrest of a former student.)

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7.	Identify whether the sampling plan results in a random sample, simple random sample, or neither. NBC News polled reactions to the last presidential election by surveying adults who were approached by a reporter at a location in New York City.

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8.	Solve the problem. What is 5% of 5020?
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9.	Determine what completes the following definition: A parameter is a numerical measurement describing some characteristic of a:

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10.	Solve the problem. In a Gallup poll of 976 adults, 68 said that they have a drink every day. What is the percentage of respondents who said that they have a drink every day? Round to the nearest tenth of a percent.

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11.	Solve the problem. Convert 83% to an equivalent decimal.

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12.	Solve the problem. In a Gallup poll of 976 adults, 32% said that they never drink. What is the actual number of surveyed adults who said that they never drink? Round to the nearest whole person.

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13.	Use common sense to determine whether the given event is impossible; possible, but very unlikely; 
or possible and likely. John rolled a pair of dice and got a total of 14.

14.	Determine whether the given description corresponds to an observational study or an experiment. A quality control specialist compares the output from a machine with a new lubricant to the output of machines with the old lubricant.

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15.	Use common sense to determine whether the given event is impossible; possible, but very unlikely; 
or possible and likely. Andre flipped a coin twice and it came up the same way both times.

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