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