Descriptive Statistics
CHAPTER TWO
DESCRIPTIVE STATISTICS: TABULAR AND GRAPHICAL PRESENTATIONS
MULTIPLE CHOICE QUESTIONS
1. A frequency distribution is a tabular summary of data showing the a. fraction of items in several classes b. percentage of items in several classes c. relative percentage of items in several classes d. number of items in several classes Answer: d
2. A frequency distribution is a. a tabular summary of a set of data showing the relative frequency b. a graphical form of representing data c. a tabular summary of a set of data showing the frequency of items in each of several nonoverlapping classes d. a graphical device for presenting qualitative data Answer: c
3. A tabular summary of a set of data showing the fraction of the total number of items in several classes is a a. frequency distribution b. relative frequency distribution c. frequency d. cumulative frequency distribution Answer: b
4. Qualitative data can be graphically represented by using a(n) a. histogram b. frequency polygon c. ogive d. bar graph Answer: d
5. The relative frequency of a class is computed by a. dividing the midpoint of the class by the sample size b. dividing the frequency of the class by the midpoint c. dividing the sample size by the frequency of the class d. dividing the frequency of the class by the sample size Answer: d
6. The sum of frequencies for all classes will always equal a. 1 b. the number of elements in a data set c. the number of classes d. a value between 0 and 1 Answer: b
7. Fifteen percent of the students in a school of Business Administration are majoring in Economics, 20% in Finance, 35% in Management, and 30% in Accounting. The graphical device(s) which can be used to present these data is (are) a. a line graph b. only a bar graph c. only a pie chart d. both a bar graph and a pie chart Answer: d
8. A researcher is gathering data from four geographical areas
DESCRIPTIVE STATISTICS: TABULAR AND GRAPHICAL PRESENTATIONS
MULTIPLE CHOICE QUESTIONS
1. A frequency distribution is a tabular summary of data showing the a. fraction of items in several classes b. percentage of items in several classes c. relative percentage of items in several classes d. number of items in several classes Answer: d
2. A frequency distribution is a. a tabular summary of a set of data showing the relative frequency b. a graphical form of representing data c. a tabular summary of a set of data showing the frequency of items in each of several nonoverlapping classes d. a graphical device for presenting qualitative data Answer: c
3. A tabular summary of a set of data showing the fraction of the total number of items in several classes is a a. frequency distribution b. relative frequency distribution c. frequency d. cumulative frequency distribution Answer: b
4. Qualitative data can be graphically represented by using a(n) a. histogram b. frequency polygon c. ogive d. bar graph Answer: d
5. The relative frequency of a class is computed by a. dividing the midpoint of the class by the sample size b. dividing the frequency of the class by the midpoint c. dividing the sample size by the frequency of the class d. dividing the frequency of the class by the sample size Answer: d
6. The sum of frequencies for all classes will always equal a. 1 b. the number of elements in a data set c. the number of classes d. a value between 0 and 1 Answer: b
7. Fifteen percent of the students in a school of Business Administration are majoring in Economics, 20% in Finance, 35% in Management, and 30% in Accounting. The graphical device(s) which can be used to present these data is (are) a. a line graph b. only a bar graph c. only a pie chart d. both a bar graph and a pie chart Answer: d
8. A researcher is gathering data from four geographical areas