Question

The following set of numbers is going to be graphed on a histogram. If there are going to be four intervals, what will the length of each interval be?
15, 18, 17, 21, 23, 27, 16, 21, 29, 24, 14, 14, 19, 22

3
4
5
6

Answer 1

The length of each interval would be 3.75 rounding to whole number is 4.

Step-by-step explanation:

• Stack in excel from lowest to highest points.
• Total number of data points are 14.
• Frequency distribution to be created.
• You can use countif function for frequency distribution.
• Since we have already got the number of intervals.
• It will be easier to calculate the number if intervals.
• normally there should be 5-15 intervals to get a better histogram.
• Basic formula is Highest data point - Lowest data point/ classes/intervals.
• So (29-14)/4 = 3.75 rounding to 4.