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A telephone call arrived at a switchboard at random within a one-minute interval. The switch board was fully busy for 15 seconds into this one-minute period. What is the probability that the call arrived when the switchboard was not fully busy?
Explain clearly what is meant by a false negative rate of 5% and a false positive rate of 15%. If the population were screened, what proportion would be expected to test negative for metropathy?
a recent survey indicated that the average yearly salary of middle school teachers in wichita kansas is 45000 with a
if a single deposit of 25000 is invested at 1.75 yearly interest what equal year-end withdrawals can be made each year
suppose referendum to increase funding for education is on the ballot in a large town population over 100000. an exit
The average salary of a group of sales people is $32,500 with a standard deviation of $2,500. Answer the following: How much would a salesperson make if he/she is 2 standard deviations above the mean?
Test the claim at alpha-.05 that the average wage has not changed by finding the p-value for the test.
Describe the use of sensitivity analysis and postoptimality analysis in analyzing the results. Describe the characteristics of a Bernoulli process. How is a Bernoulli process associated with the binomial distribution?
Find the probability that an arrival will have to wait.
The reason sample variance has a divisor of n-1 rather than n is that it makes the sample standard deviation an unbiased estimate of the population standard deviation.
1. describe the three most common causes of strength degradation of mechanical components. give examples of each with
Many people think that job satisfaction in workplace is directly related to annual income. To check the validity of this assumption survey of 430 active working adults in U.S was taken that relates their job satisfaction to their annual income.
I hypothesized that girls in my class have the same blood pressure levels as boys. The probability value for my null hypothesis was 0.15. So I conclude that the blood pressures of the girls were higher than boys'. Which kind of mistake did I make?
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