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What is the proportion of vehicles with a speed up

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Reference no: EM132167069

Assume the speed of vehicles along a stretch of the A8 highway (Monaco to Nice) has an approximately normal distribution with a mean of 118 Km/h and a standard deviation of 11 Km/h. The current speed limit is 110 Km/h.

a) What is the proportion of vehicles with a speed up to the limit?

b) What proportion of the vehicles would be going less than 95 Km/h?

c) A new speed limit will be initiated such that approximately 10% of vehicles will be over the speed limit. What is the new speed limit based on this criterion?

d) In what way do you think the actual distribution of speeds differs from a normal distribution?

Reference no: EM132167069

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