Chapter 2

Question 1

1. The following data represents the number of printer ribbons used annually in a
   company by twenty-eight departments. This is an example of ______________ data.

   8    4   5   10   6   5   4  6   3    4   4   6   1  12 2  11   2     5   3   2   6  7   6  12   7   1   8    9

Answer 1

Raw or Ungrouped

Question 2

2. Below is a frequency distribution of ages of managers with a large retail firm. This is
   an example of _______________ data.

				 Age 		 f
				20-29		11
				30-39		32
				40-49		57
				50-59		43
				over 60	18

Answer 2

Grouped

Question 3

3. For best results, a frequency distribution should have between _____ and _____
   classes.

Answer 3

5, 15

Question 4

The difference between the largest and smallest numbers is called the ____________.

Answer 4

Range

Question 5

Consider the values below.  In constructing a frequency distribution, the beginning 
                  Point of the lowest class should be at least as small as \_\_\_\_\_ and the endpoint of the 
                  highest class should be at least as large as \_\_\_\_\_.

       27  21   8  10   9  16  11  12  21  11  29  19  17  22  28  28  29  19  18  26  17  34  19  
               16  20

Answer 5

. 8, 34

Question 6

. The class midpoint can be determined by _______________.

Answer 6

Averaging the two class endpoints

Question 7

Examine the frequency distribution below:

				      class        		      frequency
			  	  5-under 10			56
				  10-under 15			43
				  15-under 20			21
				  20-under 25			11
				  25-under 30			12
				  30-under 35		 	  8
The relative frequency for the class 15-under 20 is \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.

Answer 7

21/151 = .1391

Question 8

Examine the frequency distribution below:

				      class        		      frequency
			  	  5-under 10			56
				  10-under 15			43
				  15-under 20			21
				  20-under 25			11
				  25-under 30			12
				  30-under 35		 	  8
The cumulative frequency for the class 20-under 25 is

Answer 8

131

Question 9

Examine the frequency distribution below:

				      class        		      frequency
			  	  5-under 10			56
				  10-under 15			43
				  15-under 20			21
				  20-under 25			11
				  25-under 30			12
				  30-under 35		 	  8
The midpoint for the class 25-under 30 is \_\_\_\_\_\_\_\_\_\_\_.

Answer 9

27.5

Question 10

The graphical depiction that is a type of vertical bar chart and is used to depict a
frequency distribution is a

Answer 10

Histogram

Question 11

The graphical depiction that utilizes cumulative frequencies is a

Answer 11

Ogive

Question 12

Consider the categories below and their relative amounts:

			       Category			           Amount
				   A				  112
				   B				  319
				   C				    57
				   D				  148
				   E				  202

    If you were to construct a Pie Chart to depict these categories, then you would allot     
     \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ degrees to category D.

Answer 12

148/838 of 360o = 63.6o

Question 13

. A graph that is especially useful for observing the overall shape of the distribution of
data points along with identifying data values or intervals for which there are
groupings and gaps in the data is called a ______________________.

Answer 13

Dot Plot

Question 14

Given the values below, construct a stem and leaf plot using two digits for the stem.

		346   340   322   339   342   332   338   
		357   328   329   346   341   321   332

Answer 14

32 1 2 8 9
33 2 2 8 9
34 0 1 2 6 6
35 7

Question 15

A vertical bar chart that displays the most common types of defects that occur with a
product, ranked in order from left to right, is called a ¬¬__________________.

Answer 15

Pareto Chart

Question 16

A process that produces a two-dimensional table to display the frequency counts for two
variables simultaneously is called a ____________________.

Answer 16

Cross Tabulation

Question 17

. A two-dimensional plot of pairs of points often used to examine the relationship of two
numerical variables is called a _________________.

Answer 17

Scatter Plot

Question 18

Time-series data are data gathered on a particular characteristic over a period of time at
_______________________.

Answer 18

Regular Intervals