(Test Bank) Basic Statistics for Business and Economics

Lind, 8

Business

Test Bank

8th Edition

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Test Bank for Basic Statistics for Business and Economics, The downloadable file consists of 160 pages, and the total size of the file is 3.32 MB. Purchase now only for highly discounted price.

Author(s): Lind

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Test B ank fo r Basic Statistics for Business and Economics 8th Edition by Lin d. Chapter 02 Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation True / False Questions 1. A frequency distribution groups data into classes showing the number of observations in each class. True False 2. A frequency distribution for qualitative data has class limits. True False 3. To summarize the gender of students attending a college, the number of classes in a frequency distribution depends on the number of students. True False 4. In frequency distributions, classes are mutually exclusive if each individual, object, or measurement is included in only one category. True False 5. In a bar chart, the x -axis is labeled with the values of a qualitative variable. True False 6. In a bar chart, the heights of the bars represent the frequencies in each class. True False 7. The midpoint of a class, which is also called a class mark, is halfway between the lower and upper limits. True False 8. A class interval, or class width, can be determined by subtracting the lower limit of a class from the lower limit of the next higher class. True False 9. To convert a frequency distribution to a relative frequency distribution, divide each class frequency by the sum of the class frequencies. True False 10 To convert a frequency distribution to a relative frequency distribution, . divide each class frequency by the number of classes. True False 11 A pie chart is similar to a relative frequency distribution. . True False 12 A pie chart shows the relative frequency in each class. . True False 13 To construct a pie chart, relative class frequencies are used to graph . the "slices" of the pie. True False 14 A cumulative frequency distribution is used when we want to determine . how many observations lie above or below certain values. True False 15 A frequency polygon is a very useful graphic technique when . comparing two or more distributions. True False Multiple Choice Questions 16 Monthly commissions of first-year 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(n) . A. Histogra m B. Raw data C. Frequency distribution D. Frequency polygon 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. Histogra m B. Class limits C. Class frequencies 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. 19 When data is collected using a qualitative, nominal variable, what is . true about a frequency distribution that summarizes the data? A. The upper and lower class limits must be calculated. B. A pie chart can be used to summarize the data. C. The number of classes is equal to the number of variable's values plus 2. D. The "5 to the k rule" can be applied. 20 When data is collected using a qualitative, nominal variable (in other . words, male or female), what is true about a frequency distribution that summarizes the data? A. The upper and lower class limits must be calculated. B. Class midpoints can be computed. C. The number of classes corresponds to the number of a variable's values. D. The "2 to the k rule" can be applied. 21 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: Why is the table NOT a frequency distribution? A. The number of males does not equal the sum of males that smoke and do not smoke. B. The classes are not mutually exclusive. C. There are too many classes. D. Class limits cannot be computed. 22 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: What type of chart best represents the frequency table? A. Bar chart B. Box plot C. Scatter plot D. Frequency polygon 23 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: What type of chart best represents relative class frequencies? A. Box plot B. Pie chart C. Scatter plot D. Frequency polygon 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 25 For a relative frequency distribution, relative frequency is computed as . . A. The class width divided by class interval B. The class midpoint divided by the class frequency C. The class frequency divided by the class interval D. The class 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 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. In the study, 30 students responded high interest, 40 students responded medium interest, and 30 students responded low interest. What is the relative frequency of students with high interest? A. . 30 B. . 50 C. . 40 D. . 030 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. In the study, 30 students responded high interest, 50 students responded medium interest, and 20 students responded low interest. What is the best way to illustrate the relative frequency of student interest? A. Use a cumulative frequency polygon B. Use a box plot C. Use a pie chart D. Use a frequency table 29 The monthly salaries of a sample of 100 employees were rounded to . the nearest $10. 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. $5 0 B. $10 0 C. $15 0 D. $20 0 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. 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 another party. The best way to illustrate the frequencies for each political preference is a . A. Bar chart B. Box plot C. Histogra m D. Frequency polygon 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 another party. The best way to illustrate the relative frequency distribution is a . A. Bar chart B. Pie chart C. Histogra m D. Frequency polygon 33 What is the following table called? . A. Histogra m B. Frequency polygon C. Cumulative frequency distribution D. Frequency distribution 34 For the following distribution of heights, what are the limits for the class . with the greatest frequency? A. 64 and up to 70 B. 65 and 69 C. 65 and up to 70 D. 69.5 and 74.5 35 In a frequency distribution, the number of observations in a class is . called the class . A. Midpoi nt B. Interv al C. Arra y D. Frequenc y 36 Why are unequal class intervals sometimes used in a frequency . distribution? A. To avoid a large number of empty classes B. For the sake of variety in presenting the data C. To make the class frequencies smaller D. To avoid the need for midpoints 37 The number of employees less than the upper limit of each class at . Lloyd's Fast Food Emporium is shown in the following table: What is it called? A. A histogram B. A cumulative frequency table C. A pie chart D. A frequency polygon 38 A sample distribution of hourly earnings in Paul's Cookie Factory is: . The limits of the class with the smallest frequency are: A. $6.00 and $9.00 B. $12.00 and up to $14.00 C. $11.75 and $14.25 D. $12.00 and up to $15.00 39 Refer to the following distribution of commissions: . What is the relative frequency for those salespersons that earn from $1,600 up to $1,800? A. . 02 B. . 024 C. . 20 D. . 24 40 Refer to the following distribution of commissions: . To plot a cumulative frequency distribution, the first coordinate would be . A. X = 0, Y = 600 B. X = 500, Y = 3 C. X = 3, Y = 600 D. X = 600, Y = 0 41 Refer to the following distribution of commissions: . What is the relative frequency of those salespersons that earn $1,600 or more? A. 25.5 % B. 27.5 % C. 29.5 % D. 30.8 % 42 Refer to the following distribution of commissions: . For the preceding distribution, what is the midpoint of the class with the greatest frequency? A. 1,40 0 B. 1,50 0 C. 1,70 0 D. The midpoint cannot be determined. 43 Refer to the following distribution of commissions: . What is the class interval? A. 20 0 B. 30 0 C. 3,50 0 D. 40 0 44 Refer to the following wage breakdown for a garment factory. . What is the class interval for the preceding table of wages? A. $ 2 B. $ 3 C. $ 4 D. $ 5 45 Refer to the following wage breakdown for a garment factory. . What is the class midpoint for the class with the greatest frequency? A. $5.5 0 B. $8.5 0 C. $11.5 0 D. $14.5 0 46 Refer to the following wage breakdown for a garment factory. . What are the class limits for the class with the smallest frequencies? A. 3.5 and 6.5 B. 4 and up to 7 C. 13 and up to 16 D. 12.5 and 15.5 47 Refer to the following distribution of ages: . For the distribution of ages just shown, what is the relative class frequency for the lowest class? A. . 50 B. . 18 C. . 20 D. . 10 48 Refer to the following distribution of ages: . What is the class interval? A. 9 B. 1 0 C. 10. 5 D. 1 1 49 Refer to the following distribution of ages: . What is the class midpoint of the highest class? A. 5 4 B. 5 5 C. 6 4 D. 6 5 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 "