The time to complete the construction of a soapbox derby car is normally distributed with a mean of three hours and a standard d
eviation of one hour. Find the probability that it would take more than four hours to construct a soapbox derby car.
1 answer:
Answer:
The probability that it would take more than four hours to construct a soapbox derby car = 0.1587 or 15.87
Step-by-step explanation:
Given -
Mean
= 3 hours
Standard deviation
= 1 hours
Let X be the no of hours to construct a soapbox derby car
the probability that it would take more than four hours to construct a soapbox derby car =
= 
=
Put 
= 1 -
= 1 - .8413 Using z table
= 0.1587
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<u>Part A</u>
- Male elk = 105/450 = 7/30
- Female elk = 120/450 = 4/15
- Adult elk = 173/450
- Baby elk = 52/450 = 26/225
<u>Part B</u>
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