Question

The following is the number of minutes to commute from home to work for a group of automobile executives. 28 25 48 37 41 19 32 26 17 23 51 26 21 32 16 31 43 35 42 38 1. Using 4 classes/intervals, construct a frequency distribution starting with lowest data. Refer to the table below: Class Intervals Class Boundaries Midpoint Frequency Cumulative Frequency 2. Draw the following: Frequency Histogram, Polygon and Ogive.

Answer 1

The full process is done in Ms Excel.

Steps followed.

For histogram , used the Bar graph with gap between bars zero and used the class intervals and frequency columns.

For polygon ,used the line graph with markers and used the frequency and mid points columns.

For ogive ,used the line graph and the cumulative frequency column.

All the data points are arranged in 4 intervals as said with width of 9 considering the lowest data point 16 as the starting value.

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