Question 1 of 20
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5.0 Points |
A student was interested in the cigarette smoking habits of college students and collected data from an unbiased random sample of students. The data is summarized in the following table:
| Males Surveyed |
50 |
Females Surveyed |
75 |
| Males Who Smoke |
20 |
Females Who Smoke |
25 |
| Males Who Do Not Smoke |
30 |
Females Who Do Not Smoke |
50 |
Why is the table NOT a frequency distribution?
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A. The number of males does not equal the sum of males that smoke and do not smoke. |
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B. The classes are not mutually exclusive. |
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C. There are too many classes. |
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D. Class limits cannot be computed. |
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What’s This?
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The main purpose of descriptive statistics is to:
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A. data in a useful and informative manner. |
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B. make inferences about a population. |
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C. determine if the data adequately represents the population. |
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D. gather or collect data. |
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What’s This?
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A poll of 1,000 voters used to predict the outcome of a statewide election is an example of:
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A. descriptive statistics. |
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B. continuous variable measurement. |
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C. statistical inference. |
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D. deductive statistics. |
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What’s This?
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The number of fishing boats shipped from a manufacturer to a dealer each month is described as a:
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A. random variable. |
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B. qualitative variable. |
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C. discrete variable. |
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D. continuous variable. |
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What’s This?
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The kinds of numbers that can take on any value, either a fraction or integer, between specified limits are called:
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A. random variables. |
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B. qualitative variables. |
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C. discrete variables. |
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D. continuous variables. |
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What’s This?
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Which of the following is an example of a qualitative variable?
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A. Number of children in a family |
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B. Weight of a person |
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C. Color of ink in a pen |
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D. Miles between oil changes |
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What’s This?
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Data obtained on the preferences of different religious groups for specific types of network television programming is an example of:
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A. random variables. |
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B. qualitative variables. |
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C. discrete variables. |
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D. continuous variables. |
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What’s This?
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__________ level data are mutually exclusive and exhaustive, and categories are scaled according to the amount of the characteristic they possess, and zero represents a point on the scale.
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A. Nominal |
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B. Ordinal |
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C. Interval |
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D. Ratio |
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What’s This?
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A bank asks customers to evaluate the drive-through service as good, average, or poor. Which level of measurement does this classification illustrate?
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A. Nominal |
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B. Ordinal |
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C. Interval |
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D. Ratio |
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What’s This?
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Information can be misrepresented:
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A. through misleading charts and graphs. |
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B. by reporting of an association of variables as causation. |
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C. by presenting average data that misrepresents sample or population data. |
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D. All of the above |
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What’s This?
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The first procedure we use to describe a data set is:
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A. differentiation. |
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B. classification. |
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C. data correlation. |
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D. frequency distribution. |
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What’s This?
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The number of observations in each class is called the:
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A. data set |
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B. class size |
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C. class frequency |
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D. class interval |
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What’s This?
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Which of the following is not a step used to organize data into a frequency distribution?
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A. decide on the number of classes. |
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B. determine the class interval. |
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C. prepare the raw data. |
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D. set the individual class limits. |
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What’s This?
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The _________ can be computed by adding the lower class limit to the upper class limit and dividing by 2.
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A. class midpoint |
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B. class interval |
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C. class mark |
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D. class size |
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What’s This?
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A _________ is especially useful for depicting nominal level data.
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A. bar chart |
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B. line chart |
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C. histogram |
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D. pie chart |
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What’s This?
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A set of data consists of 230 observations between $235 and $567. What class interval would you recommend?
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What’s This?
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Both the _________ and the _________ allow us to get a quick picture of the main characteristics of the data.
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A. frequency distribution chart, polygraph |
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B. histogram, frequency polygon |
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C. pie chart, line chart |
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D. horizontal bar chart, vertical bar chart |
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What’s This?
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A stem-and-leaf display is an alternative to a:
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A. histogram |
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B. frequency distribution |
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C. frequency polygon |
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D. horizontal bar chart |
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