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A recent survey of 50 executives who were laid off from their previous position revealed it took a mean of 26 weeks for them to find another position. The standard deviation of the sample was 6.2 weeks. Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer.
Determine the percentage of samples of size 16 that will have mean amounts of coffee within 0.1 ounce of the population mean of 8.2 ounces.
Convert the given fraction into its other two forms? Evaluate expression. Use a calculator to check.
Create Gantt chart using MSP. Suppose the 5 day workweek, compute critical path of the project.
Find the probability that a randomly selected teacher earns and what sample size is necessary to double the standard error of the mean and what sample size is needed to cut the standard error of the mean in half?
What is the idea of "least squares"? What is the connection between "least squares" and linear regression?
The mean diastolic blood pressure for random sample of 90 people was 92 millimeters of mercury. If the standard deviation of individual blood pressure readings is known to be 12 millimeters of mercury
The president of the American Insurance Institute wants to compare the yearly costs of auto insurance offered by two leading companies.
In a random sample of 400 items, 88 are defective. If the null hypothesis is that 20% of the items in the population are defective, what is the value of ZSTAT?
Results sufficient to conclude that the self-hypnosis has a significant effect? Assume that increasing and decreasing allergic reactions are equally likely if the training has no effect. Use a = .05.
Analyst computes production cost per unit in each order and averages these to get $50.
For the variable you identify another graphical display that might be useful and construct it. What conclusions can you reach from this other plot that cannot be made from the boxplot?
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
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