A radar is installed on a main road for the purpose of measuring the speed of cars traveling during peak hours of traffic. Assume that the speeds have a normal distribution with an average of 62 mph. Use answer questions 15 through 20 15. Find the standard deviation (two decimal places) of all speeds, if 396 of the cars travel faster than 72mph
a.5.32
b.1.88
c.3.57
d.5.85
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a) 5.32 may be.....
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