Introduction to Cumulative Frequency and Less Than Type Ogive Graph

The video tutorial introduces cumulative frequency and its graphical representation, the ogive. It focuses on the 'less than' type ogive, using an example of workers' daily income to explain grouped data and frequency distribution. The tutorial demonstrates how to calculate cumulative frequency, plot it on a graph, and find the median using the ogive. The session concludes with a summary of the less than type method.

What is the graphical representation of cumulative frequency called?

• Bar Chart

• Ogive

• Pie Chart

• Histogram

In the example of workers' daily income, what is the class size of each group?

• 30

• 20

• 40

• 10

What does the cumulative frequency represent?

• The average frequency

• The highest frequency

• The sum of all frequencies

• The running total of frequencies

Which axis represents the upper limits in the graph of cumulative frequency?

• X-axis

• Z-axis

• None

• Y-axis

What is the scale set for the x-axis in the graph?

• 1 cm = 10 rupees

• 1 cm = 5 rupees

• 1 cm = 20 rupees

• 1 cm = 15 rupees

What is the characteristic shape of a less than type ogive?

• Circular curve

• Flat line

• Decreasing curve

• Increasing curve

What is the purpose of setting scales on the graph axes?

• To add more data points

• To confuse the viewer

• To ensure accurate representation of data

• To make the graph look better

How is the median found from the ogive?

• By locating n/2 on the y-axis and drawing a line to the x-axis

• By finding the lowest point on the curve

• By calculating the average of all data points

• By finding the highest point on the curve

What is the median of the given data set?

• 100

• 150

• 125

• 137.5

What is the first step in summarizing the less than type method?

• Draw the graph

• Identify the upper limits

• Find the median

• Calculate the total frequency