Understanding Descriptive Statistics and Graphs

What is the primary purpose of using descriptive statistics?

• To collect raw data

• To summarize raw data

• To create complex mathematical models

• To conduct experiments

Which type of table is used to collect raw data in the form of observations?

• Summary table

• Frequency table

• Descriptive table

• Data analysis table

What is another name for a frequency table?

• Scattergram

• Line graph

• Pie chart

• Tally chart

Which measure of central tendency might be recorded in a summary of descriptive statistics?

• Median

• Range

• Mode

• Mean

What type of data is a bar chart used to summarize?

• Continuous data

• Categorical data

• Ordinal data

• Interval data

In a bar chart, where is the categorical variable usually placed?

• On the X axis

• In the legend

• On the Z axis

• On the Y axis

What does it suggest if the bars in a chart are touching?

• The data is categorical

• The data is ordinal

• The data is continuous

• The data is nominal

What does a pie chart represent?

• Frequency as a tally

• Frequency as a mean

• Frequency as a range

• Frequency as a percentage

What type of graph is used to show the relationship between two co-variables?

• Bar chart

• Pie chart

• Histogram

• Scattergram

What is a common example of data that might be displayed in a histogram?

• Brand of phone

• Age group

• Type of car

• Favorite pet