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A trucking company has determined that, on an annual basis, the distance travelled per truck is normally distributed with a mean of 55 thousand kilometres and a standard deviation of 17.4 thousand kilometres.
a) What is the probability that the 22 trucks based in the Toronto office average at most 46 thousand kilometres? (0.0076)
b) There are 42 trucks based in the Montreal office, there is a 95% chance that the average annual distance driven by these trucks is more than how many kilometers? (50.58 thousand km.)
An elevator containing five people can stop at any of seven floors. What is the probability that no two people get off at the same floor?
Their initial expenditure would be drilling, which would cost $80,000. If they strike gas, they would have to spend an additional $50,000 to cap the well and provide for the necessary hardware and control equipment.
Suppose you and 1 each roll ten dice. What is the probability that we each roll the same number of sixes?
If the baseline risk of a certain disease for nonsmokers is 1% and the relative risk of the disease is 5 for smokers compared to nonsmokers.
Suppose the boundary conditions are that u(x,y) vanishes on the lines x=0 ,x=3, y=0, and y=2. Derive the corresponding boundary conditions for f and g. Given k^2, show that only certain values of the separation constant lead to non-trivial solution..
The lottery. Many states run lotteries, giving away millions of dollars if you match a certain set of winning numbers. How are those numbers determined?
A company has 140 employees, of which 30 are supervisors. Eighty of the employees are married, and 20% of the married employees are supervisors. If a company employee is randomly selected, what is the probability that the employee is married and a..
When sampling is from a population with mean 53 and standard deviation 10, using a sample of size 400, what are the expected value and the standard deviation?
It is believed that population standard deviation is 15 days. If test is conducted using a 0.05 level of significance, what conclusion must be reached?
Which of the following is not an advantage of using a cluster sample instead of other types of samples?
Biology and Environmental Science The amount of chlorophyll near Stearns Wharf in Santa Barbara, California, varies due to the seasons.
Students are sometimes confused by the reasons for blocking and for randomization. One method is used to control known sources of variability.
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