Histograms and Others

Front

What is a histogram?

Back

A histogram is a type of bar graph that represents the frequency distribution of numerical data. It shows how many data points fall within specified ranges (intervals).

Front

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

Back

A bar graph displays categorical data with rectangular bars, while a histogram displays numerical data and shows the frequency of data points within certain ranges.

Front

What is an interval in a histogram?

Back

An interval is a range of numbers that groups data points together in a histogram.

Front

How do you find the total number of students surveyed if given a percentage?

Back

Use the formula: Part/Total = %/100. Rearranging gives Total = Part / (%/100).

Front

What does the height of a bar in a histogram represent?

Back

The height of a bar in a histogram represents the frequency (number of occurrences) of data points within that interval.

Front

What is a stem-and-leaf plot?

Back

A stem-and-leaf plot is a method of displaying quantitative data in a graphical format, similar to a histogram, but retains the original data values.

Front

How can you determine the most common range in a histogram?

Back

Look for the tallest bar in the histogram; the range it represents is the most common.

Front

What is the purpose of a circle graph (pie chart)?

Back

A circle graph, or pie chart, is used to represent data as parts of a whole, showing the relative sizes of categories.

Front

If 48 students were surveyed and 14 chose soccer, what percentage chose soccer?

Back

Percentage = (14/48) * 100 = 29.17%.

Front

What type of data is best represented by a histogram?

Back

Quantitative data, which is numerical and can be grouped into intervals.