stem and leaf plot

Question

can you help me plot the stem and leave plot for the following numbers: 3, 2, -1, 12.01, 3, 4, 6, 31, 3, 2

 

and find then state the mode, range, mean, q1, median,q2, interquartile range, mean absolute deviation,

Answer 1

To do a stem and leaf plot, draw a t-chart.  The left column of the chart contains the tens digit of each number.  The right column contains the units digit of each number.  Beware of frequencies in the numbers.  They must be included.

 

For example,  57 and 68 would be

 

S  |   L

______

5      7

6      8

 

 

Using your actual numbers,

 

S   |   L

_________________________

0   |   -1, 2 , 2 , 3 , 3 , 3 , 4 , 6

1   |    2.01

3   |    1

 

 

Note that the plot organized your numbers from least to greatest.  This will allow you to easily find the median, mode and range.

 

To find the interquartile range, take the mean of the median and the least number, as well as the mean of the median and the largest number.