Here is a data set summarized as a stem-and-leaf plot:
5# | 0022234569
6# | 01145555667779
7# | 01256
8# | 149
How many data values are in this data set? n=
What is the minimum value in the last class? ans =
What is the frequency of the modal class? (Hint, what is the mode?) frequency =
How many of the original values are greater than 70? ans=
Stem and leaf plot can be expressed as below
Class interval. Frequency
50-60 10
60-70 14
70-80 5
80-90 3
Total no of data values in data set, n=32
Minimum value in the last class i.e. in 80-90 is 81.
Mode is the value which appears the most
From the mentioned plot we observe that 65 occurs most times i.e 4 ..
Hence 65 is the mode
And if the modal class is considered 60-70 is Modal class which has maximum frequency =14
No of values greater than 70 are 8 which lie in the last two classes...
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