Answer:
a)
Stem Leaf
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6 | 5 5 6 7
7 | 0 0 0 1 1 2 2 3 3 3 5 5 8 9
8 | 0 0 0 1 1 2
Notation: For example 6|5 means 65 mph , or 8|2 means 82 mph
b) Yes. Since the speed limit is 65 mph, and we have all the values above or equal to 65 mph the officer should be worried since all the speeds are higher than the speed limit
Step-by-step explanation:
Part a
Data given: 66 72 73 82 80 81 79 65 70 71 80 75 75 65 67 72 73 73 80 81 78 71 70 70
For this case the first step is order the dataset on increasing way and we got:
65 65 66 67 70 70 70 71 71 72 72 73 73 73 75 75 78 79 80 80 80 81 81 82
Now we can construct the stem and leaf diagram like this:
Stem Leaf
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6 | 5 5 6 7
7 | 0 0 0 1 1 2 2 3 3 3 5 5 8 9
8 | 0 0 0 1 1 2
Notation: For example 6|5 means 65 mph , or 8|2 means 82 mph
Part b
Yes. Since the speed limit is 65 mph, and we have all the values above or equal to 65 mph the officer should be worried since all the speeds are higher than the speed limit