Question

stories in the worlds tallest buildings the number of stories in each of a sample of the worlds 23 tallest buildings follows. construct a grouped frequency distribution and a cumulative frequency distribution with 7 classes.
what is the class width for a frequency distribution with 7 classes?
the class width is
send data to excel
60 85 70
75 65 88
79 71 103
90 64 88
88 100 78
75 80 80
80 72 77
60 70 69
part: 0 / 5
part 1 of 5

Explanation:

Step1: Find the maximum and minimum values

From the data, the maximum value \( M = 103 \), the minimum value \( m=60 \).

Step2: Calculate the range

The range \( R = M - m=103 - 60=43 \).

Step3: Calculate the class width

The number of classes \( k = 7 \). The class width \( w=\lceil\frac{R}{k}
ceil=\lceil\frac{43}{7}
ceil \). Since \( \frac{43}{7}\approx6.14 \), we round up to \( w = 7 \).

Answer:

7