Chapter 2—Descriptive Statistics: Tabular And Graphical Presentations

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. 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 categorical dataA 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 distributionThe percent frequency of a class is computed by a. multiplying the relative frequency by 10 b. dividing the relative frequency by 100 c. multiplying the relative frequency by 100 d. adding 100 to the relative frequencyThe 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 1Fifteen 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 chart b. only a bar chart c. only a pie chart d. both a bar chart and a pie chartA researcher is gathering data from four geographical areas designated: South = 1; North = 2; East = 3; West = 4. The designated geographical regions represent a. categorical data b. quantitative data c. label data d. either quantitative or categorical dataCategorical data can be graphically represented by using a(n) a. histogram b. frequency polygon c. ogive d. bar chartA cumulative relative frequency distribution shows a. the proportion of data items with values less than or equal to the upper limit of each class b. the proportion of data items with values less than or equal to the lower limit of each class c. the percentage of data items with values less than or equal to the upper limit of each class d. the percentage of data items with values less than or equal to the lower limit of each classIf several frequency distributions are constructed from the same data set, the distribution with the widest class width will have the a. fewest classes b. most classes c. same number of classes as the other distributions since all are constructed from the same dataThe sum of the relative frequencies for all classes will always equal a. the sample size b. the number of classes c. one d. any value larger than oneThe most common graphical presentation of quantitative data is a a. histogram b. bar chart c. relative frequency d. pie chartThe total number of data items with a value less than the upper limit for the class is given by the a. frequency distribution b. relative frequency distribution c. cumulative frequency distribution d. cumulative relative frequency distributionThe relative frequency of a class is computed by a. dividing the cumulative frequency of the class by n b. dividing n by cumulative frequency of the class c. dividing the frequency of the class by n d. dividing the frequency of the class by the number of classesIn constructing a frequency distribution, the approximate class width is computed as a. (largest data value - smallest data value)/number of classes b. (largest data value - smallest data value)/sample size c. (smallest data value - largest data value)/sample size d. largest data value/number of classesIn constructing a frequency distribution, as the number of classes are decreased, the class width a. decreases b. remains unchanged c. increases d. can increase or decrease depending on the data valuesThe difference between the lower class limits of adjacent classes provides the a. number of classes b. class limits c. class midpoint d. class widthIn a cumulative frequency distribution, the last class will always have a cumulative frequency equal to a. one b. 100% c. the total number of elements in the data set d. None of these alternatives is correct.In a cumulative relative frequency distribution, the last class will have a cumulative relative frequency equal to a. one b. zero c. the total number of elements in the data set d. None of these alternatives is correct.2. In a cumulative percent frequency distribution, the last class will have a cumulative percent frequency equal to a. one b. 100 c. the total number of elements in the data set d. None of these alternatives is correct.