the data set lists the prices (in dollars) of 30 portable global positioning system (gps) navigators. 128…
the data set lists the prices (in dollars) of 30 portable global positioning system (gps) navigators. 128 100 180 150 200 90 340 105 85 270 200 65 230 150 150 120 130 80 230 200 110 126 170 132 140 112 90 340 170 190 what is the number of classes?
Answer
Explanation:
Step1: Determine common rule for number of classes
Typically, when creating a frequency - distribution, we use Sturges' rule which is $k = 1+3.322\log_{10}(n)$, where $n$ is the number of data points. Here, $n = 30$.
Step2: Calculate number of classes
First, find $\log_{10}(30)$. $\log_{10}(30)\approx1.4771$. Then, $3.322\times1.4771\approx4.91$. And $1 + 4.91\approx5.91$. We usually round up to the next whole number.
Answer:
6