Histogram and Data Representation Concepts

The video tutorial explains how to represent data using class intervals and frequency. It covers the concept of continuous intervals, where the upper limit of one interval is the lower limit of the next. The tutorial demonstrates how to draw and label axes, choose a suitable scale, and plot data to create a histogram. It highlights the difference between bar graphs and histograms, emphasizing the continuous nature of intervals in histograms.

What does the first row in the table represent?

• The average price of pens

• The total revenue

• The price range of pens

• The number of pens sold

In a continuous class interval, which limit is included?

• Only the lower limit

• Both limits

• Neither limit

• Only the upper limit

What is the main difference between bar graphs and histograms?

• Histograms have gaps between bars, bar graphs do not

• Bar graphs are used for numerical data, histograms for categorical

• Histograms use continuous intervals, bar graphs do not

• Bar graphs use intervals, histograms do not

What is the first step in drawing a histogram?

• Choosing a scale for the axes

• Labeling the axes

• Drawing the bars

• Drawing the x and y axes

How is the scale for the y-axis chosen in the video?

• 1 cm equals 1 pen

• 1 cm equals 10 pens

• 1 cm equals 5 pens

• 1 cm equals 15 pens

What is the frequency of pens sold in the 10 to 20 rupees range?

• 25 pens

• 15 pens

• 10 pens

• 20 pens

What is the length of the bar for a frequency of 20 pens?

• 5 cm

• 4 cm

• 3 cm

• 2 cm

What is a histogram used to represent?

• Qualitative data

• Categorical data

• Discrete data

• Continuous class intervals

What happens if the class intervals are discontinuous?

• The histogram will have gaps

• The data will be inaccurate

• The histogram will be the same

• The intervals will merge

What is the upper limit of the first interval used for?

• As the average for the next interval

• As the midpoint for the next interval

• As the lower limit for the next interval

• As the upper limit for the next interval