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

Explanation:

Step1: Find the range of the data

The maximum value in the salary intervals (from the x - axis of the histogram: \(0 - 19\), \(20 - 29\), \(30 - 39\), \(40 - 49\), \(50 - 59\), \(100 - 199\), \(200 - 299\)) is \(299\) (from the \(200 - 299\) interval) and the minimum value is \(0\). The range \(R=299 - 0=299\).

Step2: Calculate the number of intervals

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

Answer:

25 or more