PUMPA - SMART LEARNING

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டவுன்லோடு செய்யுங்கள்We know that histograms are created on continuous data.

Let us consider the data table given below and try to construct a histogram step-by-step.

Problem:

A private organization conducted a survey across hundred schools in Chennai. The organization collected the average number of kindergarten children in each classroom.

The data table looks like this:

Number of students | \(25\) - \(30\) | \(30\) - \(35\) | \(35\) - \(40\) | \(40\) - \(45\) | \(45\) - \(50\) |

Frequency | \(15\) | \(35\) | \(18\) | \(25\) | \(7\) |

**Now, let us try to construct a histogram**.

**Step**\(1\): Convert the data received into continuous data.

Here, the data is already in continuous form. Hence, no conversion is required.

**Step**\(2\): Select appropriate names and units for \(X\)-axis and \(Y\)-axis.

**Here, the axes will look like this**:

**Step**\(3\): Now mark the class intervals along the \(X\)-axis, and the frequency along the \(Y\)-axis.

**Step**\(4\): Now, construct rectangles with class intervals as the base, and the frequency as the height.