Business stats F exam
A portion of the population selected to represent the population is called a. a sample b. statistical inference c. a census d. descriptive statistics
a
Industry Type Banking. 8 Consumer Products. 13 Electronics. 8 Retail. 21 The number of industries that are classified as retail is a. 21 b. 0.42 c. 29 d.42
a
The graph below best exemplifies a Value of a U.S. Dollar Compared te a 1913 de a. time series graph b. line graph c. bar graph d. cross-sectional graph
a
The sum of frequencies for all classes will always equal a, the number of elements in a data set b. a value between 0 and c. the number of classes d. 1
a
the term —— is used to refer to the process of capturing, storing, and maintaining data. a) data warehousing b) data mining c) data analysis d) data collection
a
A graphical device for presenting categorical data summaries based on subdivision of a circle into sectors that correspond to the relative frequency for each class is a a, stem-and-leaf display b. pie chart c. bar chart d. histogram
b
The relative frequency of a class is computed by a. dividing the frequency of the class by the midpoint b. dividing the frequency of the class by the sample size c. dividing the sample size by the frequency of the class d. dividing the midpoint of the class by the sample size
b
The set of measurements collected for an element is called a(n) a. sample b. observation c. variable d. census
b
In a cumulative frequency distribution, the last class will always have a cumulative frequency equal to a. 100% b 1 c. the total number of elements in the data set d a value between 0 and 1
c
In a crosstabulation. a. both variables must be categorical b. both variables must be quantitative c. one variable must be categorical and the other must be quantitative d, either or both variables can be categorical or quantitative
d
Of 800 students in a university, 360, or 45%, live in the dormitories. The 800 is an example of à. à sample b. statistical inference c. descriptive statistics d. a population
d
Quantitative data a, are always nonnumeric b. may be either numeric or nonnumeric c. are always labels d. are always numeric
d
Statistical inference a. is the same as descriptive statistics b. refers to the process of drawing inferences about the sample based on the characteristics of the population C. is the same as a census d. is the process of drawing inferences about the population based on the information taken from the sample
d
Which of the following is NOT an example of an existing source of data? a. internal company records b. the Internet c. U.S. Census Bureau d. data from an experiment
d
Which of the following variables uses the interval scale of measurement? a. time b. name of stock exchange c. social security number d. SAT scores
d
income is an example of a, currency data b. categorical data C, either categorical or quantitative data d. quantitative data
d