Chapter 2

Question 1

Frequency Table

Answer 1

A grouping of qualitative data into mutually exclusive classes showing the number of observations in each class.

Question 2

The number of observations in each class is called the:

Answer 2

class frequency

Question 3

Relative class frequencies

Answer 3

converted class frequencies showing the fraction of the total number of observations in each class.

Shows the relationship between a class total and the total number of observations.

example: 50/80 = 0.625

Question 4

Bar Chart

Answer 4

A graph in which the classes are reported on the horizontal axis and the class frequencies on the vertical axis. The class frequencies are proportional to the heights of the bars.

Question 5

Pie Chart

Answer 5

A chart that shows the proportion or percent that each class represents of the total number of frequencies.

Question 6

Relative frequency table

Answer 6

A frequency table with the relative frequency added.

Question 7

Frequency Distribution

Answer 7

A grouping of data into mutually exclusive classes showing the number of observations in each class.

Question 8

How can you best decide the number of classes for a frequency distribution table?

Answer 8

n=2^k where k is the number of classes and n is the number of observations. The result of this equation will usually be a good number of classes you should use.

Question 9

How can you easily determine the class interval (or width)

Answer 9

i ≤ (H - L) / k
where i is the class interval, H is the highest observed value, L is the lowest observed value, and k is the number of classes.

Question 10

Five steps to create a frequency distribution table

Answer 10

1 Decide on the number of classes. n=2^k
2 Determine the class interval or width. i ≤ (H - L) / k
3 Set the individual class limits.
4 Tally the vehicle selling prices into the classes.
5 Count the number of items in each class.

Question 11

The number of observations in each class

Answer 11

Class Frequency

Question 12

The halfway point between the lower limits of two consecutive classes

Answer 12

Class midpoint

Question 13

How do you get the class interval?

Answer 13

Subtract the lower limit of a class from the lower limit of the next class.

Question 14

How do you determine the beginning of the first class interval?

Answer 14

try to make it a multiple of the class interval.

Question 15

Histogram

Answer 15

A graph in which the classes are marked on the horizontal axis and the class frequencies on the vertical axis. The class frequencies are represented by the heights of the bars and the bars are drawn adjacent to each other.

Question 16

Frequency polygon

Answer 16

shows the shape of a distribution and is similar to a histogram. It is a line graph with connected dots.

Question 17

Cumulative Frequency Polygon

Answer 17

This is how we graphically portray a Cumulative Frequency Distribution

Question 18

Cumulative Frequency Distribution

Answer 18

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