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20 Cards in this Set
 Front
 Back
16. Monthly commissions of firstyear insurance brokers are $1,270, $1,310, $1,680, $1,380, $1,410, $1,570, $1,180 and $1,420. These figures are referred to as: A. histogram.B. raw data.C. frequency distribution.D. frequency polygon.

B. raw data.


17. A small sample of computer operators shows monthly incomes of $1,950, $1,775, $2,060, $1,840, $1,795, $1,890, $1,925 and $1,810. What are these ungrouped numbers called? A. HistogramB. Class limitsC. Class frequenciesD. Raw data

D. Raw data


18. When data is collected using a quantitative, ratio variable, what is true about a frequency distribution that summarizes the data? A. Upper and lower class limits must be calculated.B. A pie chart can be used to summarize the data.C. Number of classes is equal to the number of variable's values.D. The "5 to the k rule" can be applied.

A. Upper and lower class limits must be calculated.


19. When data is collected using a qualitative, nominal variable, what is true about a frequency distribution that summarizes the data? A. Upper and lower class limits must be calculated.B. A pie chart can be used to summarize the data.C. Number of classes is equal to the number of variable's values plus 2.D. The "5 to the k rule" can be applied.

B. A pie chart can be used to summarize the data


20. When data is collected using a qualitative, nominal variable, i.e., male or female, what is true about a frequency distribution that summarizes the data? A. Upper and lower class limits must be calculated.B. Class midpoints can be computed.C. Number of classes corresponds to the number of a variable's values.D. The "2 to the k rule" can be applied.

C. Number of classes corresponds to the number of a variable's values.


24. When a class interval is expressed as: 100 up to 200, A. Observations with values of 100 are excluded from the class.B. Observations with values of 200 are included in the class.C. Observations with values of 200 are excluded from the class.D. The class interval is 99.

C. Observations with values of 200 are excluded from the class.


25. The relative frequency for a class is computed as the class A. width divided by class interval.B. midpoint divided by the class frequency.C. frequency divided by the class interval.D. frequency divided by the total frequency.

D. frequency divided by the total frequency.


26. The relative frequency for a class represents the A. class width.B. class midpoint.C. class interval.D. percent of observations in the class.

D. percent of observations in the class.


27. A group of 100 students was surveyed about their interest in a new International Studies program. Interest was measured in terms of high, medium, or low. 30 students responded high interest; 40 students responded medium interest; 30 students responded low interest. What is the relative frequency of students with high interest? A. .30B. .50C. .40D. Cannot be determined.

A. .30


28. A group of 100 students were surveyed about their interest in a new Economics major. Interest was measured in terms of high, medium, or low. 30 students responded high interest; 50 students responded medium interest; 20 students responded low interest. What is the best way to illustrate the relative frequency of student interest? A. Cumulative frequency polygonB. Bar chartC. Pie chartD. Frequency table

C. Pie chart


29. The monthly salaries of a sample of 100 employees were rounded to the nearest ten dollars. They ranged from a low of $1,040 to a high of $1,720. If we want to condense the data into seven classes, what is the most convenient class interval? A. $50B. $100C. $150D. $200

B. $100


30. A student was studying the political party preferences of a university's student population. The survey instrument asked students to identify themselves as a democrat or a republican. This question is flawed because: A. Students generally don't know their political preferences.B. The categories are generally mutually exclusive.C. The categories are not exhaustive.D. Political preference is a continuous variable.

C. The categories are not exhaustive.


31. A student was studying the political party preferences of a university's student population. The survey instrument asked students to identify their political preference, for example, democrat, republican, libertarian, or other party. The best way to illustrate the frequencies for each political preference is a: A. Bar chart.B. Pie chart.C. Histogram.D. Frequency polygon.

A. Bar chart.


32. A student was studying the political party preferences of a university's student population. The survey instrument asked students to identify their political preference, for example, democrat, republican, libertarian, or other party. The best way to illustrate the relative frequency distribution is a: A. Bar chart.B. Pie chart.C. Histogram.D. Frequency polygon.

B. Pie chart.


35. In a frequency distribution, the number of observations in a class is called class A. midpointB. intervalC. arrayD. frequency

D. frequency


36. Why are unequal class intervals sometimes used in a frequency distribution? A. To avoid a large number of empty classesB. For the sake of variety in presenting the dataC. To make the class frequencies smallerD. To avoid the need for midpoints

A. To avoid a large number of empty classes


50. Refer to the following information from a frequency distribution for "heights of college women" recorded to the nearest inch:The first two class midpoints are 62.5" and 65.5".What is the class interval? A. 1"B. 2"C. 2.5"D. 3"

D. 3"


51. Refer to the following information from a frequency distribution for "heights of college women" recorded to the nearest inch:The first two class midpoints are 62.5" and 65.5".What are the class limits for the lowest class? A. 61 and up to 64B. 62 and up to 64C. 62 and 65D. 62 and 63

A. 61 and up to 64


52. Refer to the following information from a frequency distribution for "heights of college women" recorded to the nearest inch:The first two class midpoints are 62.5" and 65.5".What are the class limits for the third class? A. 64 and up to 67B. 67 and 69C. 67 and up to 70D. 66 and 68

C. 67 and up to 70


75. A pie chart shows the A. relative frequencies of a qualitative variable.B. relative frequencies of a quantitative variable.C. frequencies of a nominal variable.D. frequencies of a ratio variable.

A. relative frequencies of a qualitative variable.
