STATISTICS STUDY GUIDE -LATEST

STATISTICS STUDY GUIDE -LATEST 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 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 categorical data 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 4. 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 5. The 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 frequency 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 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 chart b. only a bar chart c. only a pie chart d. both a bar chart and a pie chart 8. A 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 data 9. Categorical data can be graphically represented by using a(n) a. histogram b. frequency polygon c. ogive d. bar chart 10. A 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 class 11. If 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 data 12. The 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 one 13. The sum of the percent frequencies for all classes will always equal a. one b. the number of classes c. the number of items in the study d. 100 14. The most common graphical presentation of quantitative data is a a. histogram b. bar chart c. relative frequency d. pie chart 15. The 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 distribution 16. The 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 classes 17. In 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 classes 18. In 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 values 19. The difference between the lower class limits of adjacent classes provides the a. number of classes b. class limits c. class midpoint d. class width 20. In 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. 21. 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. 22. 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. 23. Data that provide labels or names for categories of like items are known as a. categorical data b. quantitative data c. label data d. category data 24. A tabular method that can be used to summarize the data on two variables simultaneously is called a. simultaneous equations b. crosstabulation c. a histogram d. an ogive 25. A graphical presentation of the relationship between two variables is a. an ogive b. a histogram c. either an ogive or a histogram, depending on the type of data d. a scatter diagram 26. A histogram is said to be skewed to the left if it has a a. longer tail to the right b. shorter tail to the right c. shorter tail to the left d. longer tail to the left 27. When a histogram has a longer tail to the right, it is said to be a. symmetrical b. skewed to the left c. skewed to the right d. none of these alternatives is correct 28. In a scatter diagram, a line that provides an approximation of the relationship between the variables is known as a. approximation line b. trend line c. line of zero intercept d. line of zero slope 29. A histogram is a. a graphical presentation of a frequency or relative frequency distribution b. a graphical method of presenting a cumulative frequency or a cumulative relative frequency distribution c. the history of data elements d. the same as a pie chart 30. A situation in which conclusions based upon aggregated crosstabulation are different from unaggregated crosstabulation is known as a. wrong crosstabulation b. Simpson's rule c. Simpson's paradox d. aggregated crosstabulation CONTINUED..................DOWNLOAD FOR BEST REVISION