A histogram is used to represent ___ data distributions.

Continuous frequency

What is the first step in drawing a histogram for continuous grouped data?

Convert inclusive class intervals to exclusive form if needed.

The height of each rectangle in a histogram represents the ___ of that class interval.

Frequency

To find the adjustment factor for discontinuous grouped data, calculate ___.

½ × (difference between the upper limit of one class and the lower limit of the next class)

If the lower limits of a class interval are 20, 30, and 40, what are their new lower limits after applying an adjustment factor of 0.5?

19.5, 29.5, 39.5

An ogive graph displays the cumulative frequencies plotted against ___ class limits.

Upper

The cumulative frequency for the class interval 25-30 with a frequency of 6 and a previous cumulative frequency of 3 is ___.

9

True or False: The base of each rectangle in a histogram represents the frequency of the class.

False; it represents the class interval.

What is the cumulative frequency for a class interval that has a cumulative frequency of 19 and a frequency of 8?

27

In a frequency polygon, the points are connected by ___ to form the graph.

Straight lines

To convert class marks into class intervals, subtract ___ from each class mark.

½ of the difference between consecutive class marks

What shape is used to represent data in a histogram?

Rectangles

The cumulative frequency table shows the ___ total of frequencies for each class.

Running

Fill in the blank: Histograms can only display ___ data distributions.

Continuous

The frequency of a class interval is represented by the ___ of the rectangle in a histogram.

Height