The electronic sign that showed the speed of motorists was installed on a road.the line plots below show the speeds of some moto rists before and after the sign was installed. based on these data which statement is true about the speeds of motorists after the sign was installed?
1 answer:
Answer:
The correct option is;
A. The mean speed and the range of the speeds of the motorists decreased
Step-by-step explanation:
Here we have the speeds given as
Before Sign Installation
Speed Frequency
20 1
24 1
25 4
30 2
35 2
38 1
40 1
∑ 212 12
Mean = 17.67
Median (25 + 30)/2 = 27.5
Range = 40 - 20 = 20
After Sign Installation
Speed Frequency
20 1
22 1
25 4
28 1
30 3
35 2
∑ 160 12
Mean = 160/12 = 13.33
Median = (25+28)/2 = 26.5
Range = 35 - 20 = 15.
Therefore, the mean speed and the range of the speeds of the motorists decreased
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Answer:
229.7125
Step-by-step explanation:
Answer:
d/c = 8
Step-by-step explanation:
f(x) = 5.4321×2^×
f(4) = 5.4321×2^4 = d
f(1) = 5.4321×2^1 = c
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