CHAPTER 2

Question 1

It is a group of data into categories showing the number of observations in each of the non-overlapping classes

Answer 1

Frequency Distribution

Question 2

It is used when the range of the data set is large.

The data are grouped into classes
Categorical
Interval or Ratio

Answer 2

Grouped Frequency Distribution

Question 3

It is used to organized nominal-level or ordinal-level type of data.
Examples:
Gender
Business Type
Political Affiliation
Year level

Answer 3

Categorical Frequency

Question 4

This method is to some extent overcomes the loss of actual observations brought about by the histogram.

Answer 4

Stem-and-Leaf plot

Question 5

is the leading digit or digits

Answer 5

stem

Question 6

is the trailing digit.

Answer 6

leaf

Question 7

A graph in which the classes are marked on the horizontal axis (x-axis) and the class frequencies on the vertical axis (y-axis).

Answer 7

Histogram

Question 8

A graph that displays the data using points which are connected by lines.

Answer 8

Frequency Polygon

Question 9

A graph that displays the cumulative frequencies for the classes in a frequency distribution.

Answer 9

Cumulative Frequency Polygon

Question 10

It represent a frequency distribution for a categorical data (or nominal-level) & frequencies are displayed by the heights of vertical bars, which are arranged in order from highest to lowest

Answer 10

Pareto Chart

Question 11

The bases of the rectangles are arbitrary intervals whose centers are the codes. The height of each rectangle represents the frequency of that category. It is also applicable for categorical data (or nominal-level).

Answer 11

Bar Chart (Bar Graph)

Question 12

A circle divided into portions that represent the relative frequencies (or percentages) of the data belonging to different categories. The data in a pie chart should be categorical or nominal-level.

Answer 12

Pie Chart (Circle Graph)

Question 13

It represents data that occur over specific period of time under observation.

It shows for a trend or pattern on the increase or decrease over the period of time.

Answer 13

Time Series Graph

Question 14

It immediately suggests the nature of the data being shown.

It is a combination of the attention-getting quality and the accuracy of the bar chart.

Appropriate pictures arranged in a row (sometimes in a column) present the quantities for comparison.

Answer 14

Pictograph

Question 15

It used to examine possible relationships between two numerical variables.

The two variables are plot in x-axis and y-axis.

Answer 15

Scatter Plot