Multiple Choice
The speed vehicles traveled on a local road was recorded for one month.The speeds ranged from 48 km/h to 63 km/h with a mean speed of 57 km/h and a standard deviation of 6 km/h.The quartiles and median speeds were 51 km/h,60 km/h,and 54 km/h.Suppose increased patrols reduced speeds by 7%.Find the new mean and standard deviation.Express your answer in exact decimals.
A) Mean: 53.01 km/h,SD: 5.58 km/h
B) Mean: 53.01 km/h,SD: 6 km/h
C) Mean: 60.99 km/h,SD: 6.42 km/h
D) Mean: 3.99 km/h,SD: 0.42 km/h
E) Mean: 60.99 km/h,SD: 6 km/h
Correct Answer:
Verified
Correct Answer:
Verified
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