Understanding Histograms and Data Representation

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 price range of pens

• The number of pens sold

• The total revenue from pen sales

• The average price of pens

In a continuous class interval, which limit is included in the interval?

• Only the upper limit is included

• Only the lower limit is included

• Neither limit is included

• Both limits are included

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

• Bar graphs represent quantities on both axes

• Histograms use continuous intervals

• Histograms do not use scales

• Bar graphs use continuous intervals

What is the first step in drawing a histogram?

• Choosing a scale for the x-axis

• Drawing the x and y axes

• Labeling the bars

• Calculating the frequency

How is the scale for the y-axis determined in this example?

• 1 cm equals 10 pens

• 1 cm equals 2 pens

• 1 cm equals 5 pens

• 1 cm equals 1 pen

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

• 10 pens

• 25 pens

• 15 pens

• 20 pens

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

• 2 centimeters

• 3 centimeters

• 5 centimeters

• 4 centimeters

What is a histogram used to represent?

• Discrete data

• Continuous class intervals

• Qualitative data

• Categorical data

What happens if the intervals are discontinuous?

• This will be explained in another video

• The histogram becomes a bar graph

• The data cannot be plotted

• The intervals need to be adjusted

What is the significance of the upper limit in continuous intervals?

• It is the midpoint of the interval

• It is never included

• It is always included

• It becomes the lower limit of the next interval