Question

kmarksA car dealership tracked the number of cars sold each month.Cars sold10090307060Number of cars50403020100November DecemberJanuaryAprilMayFebruary MarchMonthJuneWhat is the mean of this data set: 50What is the median of this data set:65What is the mode of this data set: 20.40,60

Answer 1

From the given data, the mean is given by

which gives

that is mean=50.

To find the Median, first arrange the given data in numerical order. Then select the middle value:

In our case, the middle value is between 40 and 60, so we must compute the mean between 40 and 60, which is 50. Hence, Median = 50.

The Mode is the number that occurs most often. In our case, we have 3 Modes: 20,40 and 60.

Finally, the range is the difference between the lowest and highest values. In our case, the lowest value is 20 and the highest is 90, then, the range is

`\begin{gathered} \text{range}=90-20 \\ \text{range}=70 \end{gathered}`

that is, range = 70.