Florida National University Explanatory & Cluster Variables Questions

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1. 
   
   Question 1

   2.5 PointsIdentify the population and the samle:A survey of 1300 credit card found that the average late fee is $25.75.

   1. Population: Collection of all credit cardsSample: Collection of the 1300 credit cards sampled
   2. Sample: Collection of all credit cardsPopulation: Collection of the 1300 credit cards sampled
   3. Population: Collection of all credit cardsSample: Late fee is $27.46
   4. Population: Collection of the 1300 credit cards sampledSample: Late fee is $27.46

2. 
   
   Question 2

   2.5 PointsThe number of students in a room is an example of a continuous variable.

   1. True
   2. False

3. 
   
   Question 3

   2.5 PointsThe average weight of the students in the Statistics class is an example of a continuous variable.

   1. True
   2. False

4. 
   
   Question 4

   2.5 PointsThe Social Security numbers of the employees at an engineering firm are an example of qualitative variables.

   1. True
   2. False

5. 
   
   Question 5

   2.5 PointsIdentify which sampling technique was used in the following study:Calling randomly generated telephones numbers, a study asked 1256 U. K. adults which medical conditions could be avoided by their diet.

   1. random sampling
   2. systematic sampling
   3. convenience sampling
   4. stratified sampling

6. 
   
   Question 6

   2.5 PointsIdentify which sampling technique was used in the following study:Calling randomly generated telephones numbers, a study asked 438 U. S. adults which tooth paste they prefer.

   1. random sampling
   2. stratified sampling
   3. cluster sampling
   4. convenience sampling

7. 
   
   Question 7

   2.5 PointsEach value in a data set may be referred to as either a data value or a(n) ____________.

   1. subdata
   2. datum
   3. atom
   4. point

8. 
   
   Question 8

   2.5 PointsWhat type of sampling is being employed if the country is divided into economic classes and a sample is chosen from each class to be surveyed?

   1. random sampling
   2. systematic sampling
   3. stratified sampling
   4. cluster sampling

9. 
   
   Question 9

   2.5 PointsAn independent variable can also be called a(n)

   1. free variable.
   2. explanatory variable.
   3. suggestive variable.
   4. outcome variable.

10. 
    
    Question 10

    2.5 PointsWhat level of measurement allows for the ranking of data, a precise difference between units of measure, and also includes a true zero?

    1. nominal
    2. ordinal
    3. interval
    4. ratio

11. 
    
    Question 11

    2.5 PointsWhich of the following is a frequency polygon?

    1. 
       
    2. 
       
    3. 
       
    4. 
       

12. 
    
    Question 12

    2.5 PointsThirty students recorded the colors of their eyes, choosing from the colors brown, blue, green, hazel, and black. This data can be appropriately summarized in a(n)______________ .

    1. open-ended distribution
    2. categorical frequency distribution
    3. grouped frequency distribution
    4. upper boundary

13. 
    
    Question 13

    2.5 PointsThe lower class limit represents the smallest data value that can be included in the class.

    1. True
    2. False

14. 
    
    Question 14

    2.5 PointsFind the class with the greatest number of data values.

    1. 55-65
    2. 65-75
    3. 75-85
    4. 85-95

15. 
    
    Question 15

    2.5 PointsGreg wants to construct a frequency distribution for the political affiliation of the employees at Owen’s Hardware Store. What type of distribution would be best?

    1. ungrouped
    2. grouped
    3. categorical
    4. cumulative

16. 
    
    Question 16

    2.5 PointsA weatherman records the amount of rain that fell in Portland, Oregon each day for a year. What type of graph should he use to show how rainfall changes during the year ?

    1. pie graph
    2. pictograph
    3. time series graph
    4. Pareto chart

17. 
    
    Question 17

    2.5 PointsWhich of the following pairs of class limits would be appropriate for grouping the numbers 10, 13, 8, and 15 ?

    1. 7-11 and 11-15
    2. 8-10 and 13-15
    3. 8-10 and 11-15
    4. 8-11 and 12-15

18. 
    
    Question 18

    2.5 PointsWhich of the following does not need to be done when constructing a frequency distribution?

    1. select the number of classes desired
    2. find the range
    3. make the class width an even number
    4. use classes that are mutually exclusive

19. 
    
    Question 19

    2.5 PointsWhich of the following is a histogram?

    1. 
       
    2. 
       
    3. 
       
    4. 
       

20. 
    
    Question 20

    2.5 PointsWhich graph should be used to represent the frequencies with which certain courses are taken at Highlands Middle School?

    1. Pareto chart
    2. time series graph
    3. pie graph
    4. pictograph

21.