FINDING MEAN MEDIAN MODE FROM DOT PLOT

The two dot plots show the number of miles run by 14 students at the start and at the end of the school year. Compare each measure for the two dot plots.

1. means _____

2. medians _____

3. ranges _____

Solution:

Start of the school year:

Range = maximum - minimum

= 10 - 5

= 5

End of the school year:

Median = middle observation

Median = 8 

Range = maximum -minimum

= 10 - 6

= 4

Problem 2 :

Find mean and median of the data represented in the dot plot.

Solution :

Finding Mean :

Finding Median :

9^th element is 79. So, mean = 79 and median = 79

Problem 3 :

Finding Mean :

Finding median :

9^th element is 5. So, mean is 5.05 and median is 5.

Problem 4 :

Solution :

Finding mean :

Finding median :