Question

using intervals of width 10, how many intervals are needed for this graph to be drawn correctly?
5 or fewer
between 6 and 10
between 11 and 19
25 or more
fast pax
number of employees: 12
average salary: $39,500
fast pax employee salaries
(chart with salary intervals 0-19, 20-29, 30-39, 40-49, 50-99, 100-199, 200-299 and number of employees)

Explanation:

Step1: Find the range of data

The lowest value is \(0\) and the highest value is \(299\). The range \(R=299 - 0=299\).

Step2: Calculate the number of intervals

The width of each interval \(w = 10\). The number of intervals \(n=\frac{R}{w}=\frac{299}{10}=29.9\). Since the number of intervals must be an integer, we round up to \(n = 30\).

Answer:

25 or more