Question

here is a data set summarized as a stem - and - leaf plot: 6|022333399 7|0001122234467788 8|03479 9|359 how many data values are in this data set? n = what is the minimum value in the last class? what is the minimum value in the entire sample? how many of the original values are greater than 80? question 9

Explanation:

Step1: Count data - values

Count all the leaves in the stem - and - leaf plot.
For stem 6, there are 8 leaves. For stem 7, there are 14 leaves. For stem 8, there are 5 leaves. For stem 9, there are 3 leaves. So, $n=8 + 14+5 + 3=30$.

Step2: Find minimum in last class

The last class is stem 9. The minimum value in the last class is 93.

Step3: Find minimum in entire sample

The minimum value in the entire sample is the first value in the plot. The stem is 6 and the first leaf is 0, so the minimum value is 60.

Step4: Count values greater than 80

For stem 8, there are 5 values and for stem 9, there are 3 values. So, the number of values greater than 80 is $5 + 3=8$.

Answer:

$n = 30$
93
60
8