Suppose that the speeds of cars travelling on California freeways are normally distributed with a mean of miles/hour. The highwa
1 answer:
Answer:
the standard deviation of the speeds of cars travelling on California freeways is 6.0 miles per hour
Step-by-step explanation:
The computation of the standard deviation of the speeds of cars is shown below;
The z score for the top 1% is 2.326
So,
= (75 - 61) ÷ standard deviation = 2.326
Standard deviation is
= 14 ÷ 2.326
= 6.0 miles per hour
Hence, the standard deviation of the speeds of cars travelling on California freeways is 6.0 miles per hour
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Step-by-step explanation:
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Answer:
The value of x that makes the equation true is 3
Explanation:
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