Frequency and Histograms

Is a histogram the same as a bar graph?

• Yes, because they both use intervals.

• No, because a histogram displays numerical data while a bar graph displays categorical data.

• Yes, because they both use bars to display data.

• No, because a histogram displays categorical data while a bar graph displays numerical data.

To create a histogram for this data, what would go along the x-axis?

• Frequency

• Science

• Number of students

Emily is making a histogram for the data 12, 24, 56, 7, 34, 75, 86, 78, and 96.  What is the most appropriate first interval? 

• 0-5

• 0-10

• 0-50

• 0-100

Is this an example of a histogram?

• yes

• no

Where might there be an outlier?

• 95-100

• 90-105

• 85-90

• 80-85

How many students are represented by the histogram?  

• Cannot be determined

• 9

• 31

• 35

How many vehicles get no more than 32 miles per gallon?

• 50

• 48

• 42

• 36

Which graph represents histogram?

• 
• 
• 
• 

It is useful to describe the shape of data. It can be symmetrical or have a positive or negative skew. Data with a positive skew has a long tail in the positive direction of the horizontal axis. Data with a negative skew has....

• a long tail in the direction of the negative horizontal access

• a long tail in the direction of the positive horizontal access

Is this data positively or negatively skewed?

• Positively skewed

• Negatively skewed