CF Curves

What is cumulative frequency?

• 1. The sum of all the frequencies in a dataset

• The total number of data points in a dataset

• The average value of a dataset

• The highest value in a dataset

2. Which of the following is used to plot cumulative frequency on a graph?

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3. In a cumulative frequency graph, the x-axis represents:

• The individual data points

• The upper class boundaries

• The lower class boundaries

• The frequency of each data point

4. What does the cumulative frequency curve represent?

• The distribution of individual data points

• The running total of frequencies

• The mean of the dataset

• The range of the dataset

The cumulative frequency of the last class interval should always be equal to __________.

5. What is the purpose of using cumulative frequency in statistics?

• To determine the mode of a dataset

• To calculate the median of a dataset

• To analyze the spread of data

• To identify outliers in a dataset

7. Which of the following statements is true about cumulative frequency?

• It can only be calculated for grouped data

• It is always represented by a horizontal line on a graph

• It is a measure of central tendency

• It can be used to calculate the variance of a dataset

What is the formula to calculate cumulative frequency?

Calculate the cumulative frequency for the following dataset: 5, 8, 10, 12, 15

Explain how you can calculate the median using cumulative frequency.