Answer :
The stem and leaf for the data values is
30 | 0 1 1 2 2 2 2 2 3 3 4 5 6 6 6 7 7 7 7 7 9 9
31 | 0 0 1 1 1 4 5 6 9
32 | 1 2 4 7 8 8
33 | 1 1 4 7
34 | 1 2 4 4 5 6
35 | 7
36 | 8
37 | 9
How to draw a stem and leaf for the data values
From the question, we have the following parameters that can be used in our computation:
Data values:
30.3 34.5 31.1 30.9 33.7 31.9 33.1 31.1 30.0 32.7 34.4 30.1 34.6 31.6 32.4 32.8 31.0 30.2 30.2 32.8 31.1 30.7 33.1 34.4 31.0 32.2 30.9 32.1 34.2 30.7 30.7 30.7 30.6 30.2 33.4 36.8 30.2 31.5 30.1 35.7 30.5 30.6 30.2 31.4 30.7 30.6 37.9 30.3 34.1 30.4
Sort in order of tenths
So, we have
30.0 30.1 30.1 30.2 30.2 30.2 30.2 30.2 30.3 30.3 30.4 30.5 30.6 30.6 30.6 30.7 30.7 30.7 30.7 30.7 30.9 30.9
31.0 31.0 31.1 31.1 31.1 31.4 31.5 31.6 31.9
32.1 32.2 32.4 32.7 32.8 32.8
33.1 33.1 33.4 33.7
34.1 34.2 34.4 34.4 34.5 34.6
35.7
36.8
37.9
Next, we draw the stem and leaf as follows:
a | .b
Where
a = stem
b = leaf
number = a.b
Using the above as a guide, we have the following:
Stem | Leaf
------- | -----
30 | 0 1 1 2 2 2 2 2 3 3 4 5 6 6 6 7 7 7 7 7 9 9
31 | 0 0 1 1 1 4 5 6 9
32 | 1 2 4 7 8 8
33 | 1 1 4 7
34 | 1 2 4 4 5 6
35 | 7
36 | 8
37 | 9
The histogram is attached and it shows that the task time is generally distributed between 30 and 35 seconds, with a peak at 30 seconds.
And most assemblies taking between 30 and 32 seconds to complete.
There is a small number of assemblies that took significantly longer than this, but these are outliers.
Read more about stem leaf plot at
brainly.com/question/8649311
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