Question

question #8 the following frequency distribution will be used to produce a frequency polygon. determine the class midpoint for the third class. 74.5 74.55 64.5 64.55

Explanation:

Step1: Identify the third class interval

The third class interval is \(69.6 - 79.5\).

Step2: Calculate the class midpoint

The formula for the class midpoint \(M\) of an interval \(a - b\) is \(M=\frac{a + b}{2}\).
Substitute \(a = 69.6\) and \(b=79.5\) into the formula:
\(M=\frac{69.6+79.5}{2}=\frac{149.1}{2}=74.55\)

Answer:

74.55