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Graduates from a graphic arts course at a community college have a mean starting salary of $42,000 with a standard deviation of $1,500. From a sample of 64 graduates, what is the probability that the mean starting salary is between $41,000 and $42,500?
A biologist has found that the average weight of 12 randomly selected adult mud turtles is 8.7 lb. with standard deviation 3.6 lbs. Construct a 99% confidence interval for the population mean weight of adult mud turtles.
To sketch the 3-sigma X-bar chart and R-chart parameters. A candy bar manufacturer desires to set up a variables control chart for the net weight of its candy bars.
The mean driving time is 35 minutes with a standard deviation is 10 minutes. What is the 98 percent confidence interval for the population mean?
Suppose the following table shows the number of colds 7 different people got during the typical cold season based on the number of times they washed they washed their hands per day during the cold season.
The standard deviation is around 2.8. How many students should be sampled to be within 0.5 drink of population mean with 95% probability?
Solve for the following items: The point on the x-axis that is equidistant (equal distance)from (10,4) and (6,2).
An elevator has a uniform distribution ranging from 0 to 4 minutes a) find the mean and standard deviation of x, the time a customer on the second floor waits for an elevator.
Determine the coefficient of determination R 2 . Determine standard error of the estimate s e .
Find out whether this is enough evidence to accept or reject manager's null hypothesis, using alpha = .01. Is this test left-tailed, right-tailed or two-tailed?
What is the characteristic function of N? What is the mean and variance of N? What is the pmf of N? What is the probability that N is an even number?
Suppose in a population of 100,000, the probability that an individual will die from bird flu in a given winter is .00009. If the data fits a Poisson distribution, then the mean number of people in that population that will die from bird flu in on..
Students in the industrial statistics lab at ASU calculate a lot of confidence intervals on mu. Suppose all these CIs are independent of each other.
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