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Florida International University QBM 3200 1)The_measures a distribution's standard deviation in terms of its percentage to the mean

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Florida International University

QBM 3200

1)The_measures a distribution's standard deviation in terms of its percentage to the mean.

coefficient of variation

median

z-score

variance

 

2)            The interquartile range represents the middle   of a range.

A. 75%

B. 50%

C. 25%

D. 10%

 

3)            is a single value used to describe the center point of a data set.

a.            Coefficient of variation B. Central tendency

b.            Relative position

c.             Variation

 

4)            A scatter plot is a graphical display showing the relative position of the three quartiles as a box on a number line along with the minimum and maximum values in the data set and any outliers.

True False

 

5)            In a quality control setting, the sample mean provides enough evidence to determine if a process is working properly. True

False

 

6)            Contingency tables help us identify relationships between two or more variables. True

False

 

7)            The median of a data set is found by adding all the values in the data set and then dividing the result by the number of observations. True

False

 

8)            The main drawback to using secondary data is that          .

a.            the subjects of interest are paid to provide the data B. you have no control over how the data were collected

b.            it may be expensive to obtain the data

c.             the subjects of interest need to be directly observed to collect the data

 

9)            Continuous data are values based on observations that can be counted and are typically represented by whole numbers. True

False

 

10)          Which one of the following is not a valid number for a probability? A. 0.63

B. 17%

C. 1.50

D. 0

 

11)          Which of the following is an example of quantitative data?

your telephone number

your gender

the zip code of your home address D. Apple's closing stock price today

 

12)          The sample correlation coefficient can be a positive value, a negative value, or zero. True

False

 

13)          The following chart shows the percentage of adults from various countries who admitted to texting while driving in a recent survey. What type of bar chart is this?

 

 

A. stacked

B. clustered

C. horizontal D. vertical

 

14)          Fifty employees at a local information technology services company responded to a survey asking for the number of minutes they commute to work in the morning. Management would like to know the proportion of employees whose commute is less than 30 minutes. A cumulative relative frequency distribution using grouped data would provide the information to answer this question.

True False

15)          A respondent to a survey indicates that she drives a Ford Taurus. This is an example of qualitative data. True

False

 

16)          The        identifies the number of standard deviations a particular value is from the mean of its distribution.

A.            empirical rule

B.            median

C.            coefficient of variation D. z-score