The length of time Y necessary to complete a key operation in the construction of houses...
The length of time Y necessary to complete a key operation in the construction of houses has an exponential distribution with mean 17 hours. The formula
C = 100 + 80Y + 3Y2
relates the cost C of completing this operation to the square of the time to completion. The mean of C was found to be found to be 3,194 hours and the variance of C was found to be 26,316,340.
How many standard deviations above the mean is 4,000 hours?
Would you expect C to exceed 4,000 very often? Select a number.
1. Four thousand is a large number of standard deviations from the mean and therefore indicates that values exceeding 4,000 would be uncommon.
2. Four thousand is a small number of standard deviations from the mean and therefore indicates that values exceeding 4,000 would be uncommon.
3. Four thousand is a small number of standard deviations from the mean and therefore indicates that values exceeding 4,000 would not be uncommon.
4. Four thousand is a large number of standard deviations from the mean and therefore indicates that values exceeding 4,000 would not be uncommon.
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The length of time Y necessary to complete a key
operation in the construction of houses...
The length of time Y necessary to complete a key operation in the construction of houses...
The length of time Y necessary to complete a key operation in the construction of houses has an exponential distribution with mean 9.74 hours. The formula C=96.23+43.19Y+2.75Y2 relates the cost C of completing this operation to the square of the time required to completion. Find the mean of C.
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