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Which of the following data sets is of the discrete ratio type?
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| The related political events happened in the third, seventh, and eleventh century. |
| The bulbs burned for 276.2, 345.1, 3774 hours. |
| The days were rated cold, cool, temperate, warm, hot. |
| Batches of the punch were made with 1, 2, 3, 4, or 5 cups of pineapple juice. |
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Which of the following is a statistic?
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| The set of GPA's of all students taking statistics at a particular college. |
| The set of GPA's of two students from each statistics class at a particular college. |
| The average GPA of all students taking statistics at a particular college. |
| The average GPA's of two students from each statistics class at a particular college. |
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In collecting and analyzing data to determine the preferences of the student body for various candidates for student body president, four statistics classes used different methods.
I. Each member of one class was asked to rank the candidates 1 through 5.
II. Every 100th person in the student directory was polled. Forty percent declined to answer.
III. This sample rated the candidates Allan, Betty, Clara, and Emma in the ratio 6:5:4:2:1. The election gave the ratio 7:5:4:3:2.
IV. A random collection of 100 students was gathered and asked to raise hands indicating preference for one or another of the candidates.
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| None of these samples represent errors. |
| I, II, IV have sampling errors; III a non-sampling error. |
| All have sampling errors. |
| I, II, IV have non-sampling errors; III a sampling error. |
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A survey scale was designed so that 0 corresponded to Strongly Disagree, 1 to Disagree, 2 to neutral, 3 to Agree, and 4 to Strongly Agree. The scale is
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| ratio. |
| interval. |
| ordinal. |
| nominal. |
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The number of defective products produced by a manufacturer.
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| Continuous |
| Discrete |
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The temperature in Manhattan at 1 p.m. on New years Day was 34.1°F.
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| Ordinal |
| Nominal |
| Ratio |
| Interval |
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In response to a question on a PBS program on "Saving the Environment", 4 of 5 panelists said they would be willing to spend 10% more on energy to reduce pollution. The station followed with announcements that 80% of Americans are willing to pay more for energy to reduce pollution.
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| This process is consistent with good statistics practice. |
| The announcement is suspect. |
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A T.V. show's executives commissioned a study to gauge the impact of the show's ratings on the sales of its advertisers.
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| Experimental |
| Observational |
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One hundred students are selected at random from each of the freshman, sophomore, junior, and senior classes at a college.
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| Systematic |
| Cluster |
| Stratified |
| Random |
| Convenience |
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To avoid working late, a quality control analyst simply inspects the first 100 items produced in a day.
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| Random |
| Systematic |
| Convenience |
| Cluster |
| Stratified |