SOM 120 Topic 2

Histogram

- good for quantitative data

The sum of the relative frequencies for all classes will always equal _____.

1

A tabular method that can be used to summarize the data on two variables simultaneously is called _____.

a crosstabulation

In a crosstabulation, _____.

either or both variables can be categorical or quantitative

Scatter diagram

explain the relationship between 2 QUANTITATIVE variables -Positive: if both are decreasing or increasing

A graphical device for presenting categorical data summaries based on subdivision of a circle into sectors that correspond to the relative frequency for each class is a _____.

pie chart

Percentage frequency

relative frequency x 100

The height and weight are recorded by the school nurse for every student in a school. What type of graph would best display the relationship between height and weight?

scatter diagram

Bar chart

A graphical device for depicting categorical variables

What is the difference between a bar graph and a histogram?

A histogram displays quantitative data, while a bar graph displays categorical data.

Excel's Chart Tools can be used to construct a _____.

All of these can be constructed using Excel's Chart Tools.

Pie chart

Another way to graphically summarize categorical variables

The relative frequency of a class is computed by _____.

dividing the frequency of the class by the sample size

A graphical device for depicting categorical data that have been summarized in a frequency distribution, relative frequency distribution, or percent frequency distribution is a(n) _____.

bar chart

There are 20 boys and 8 girls in a class. What type of graph can be used to display this information?

bar graph

Fifteen percent of the students in a School of Business Administration are majoring in Economics, 20% in Finance, 35% in Management, and 30% in Accounting. The graphical device(s) that can be used to present these data is(are) _____.

both a bar chart and a pie chart

Frequency distributions can be made for _____.

both categorical and quantitative data

A researcher is gathering data from four geographical areas designated: South = 1; North = 2; East = 3; West = 4. The designated geographical regions represent _____.

categorical data

To construct a bar chart using Excel's Chart Tools, choose __________ as the chart type.

column

A frequency distribution is a _____.

tabular summary of a set of data showing the number of items in each of several nonoverlapping classes

The sum of frequencies for all classes will always equal _____.

the number of elements in a data set

Relative frequency

the proportion of observations that belongs to a class

In Excel, the line of best fit for the points in a scatter diagram is called a _____.

trendline