Question

calculating statistics on line plots find the median of the number of pizza toppings per pizza recorded on the line plot.

Explanation:

Step1: Count data points

There is 1 '2', 3 '3's, 1 '3.5', 4 '4.5's, 1 '6'. So in total, there are $1 + 3+1 + 4+1=10$ data - points.

Step2: Use median formula for even number of data points

For an even number of data - points $n = 10$, the median is the average of the $\frac{n}{2}$th and $(\frac{n}{2}+1)$th ordered data points. $\frac{n}{2}=\frac{10}{2}=5$ and $\frac{n}{2}+1 = 6$.

Step3: Order data and find median values

Ordering the data, the 5th and 6th values are both '4.5'. The average of 4.5 and 4.5 is $\frac{4.5 + 4.5}{2}=4.5$.

Answer:

4.5