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what is the probability of selecting a sample mean of 7 or less , with a sample population of 9 and mean of 10 and a standard deviation of 3.
Find out the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect? What percent of the garages take between 29 hours and 34 hours to erect?
Quality Progress, Feburary 2005, reports on the results achieved by Bank of America in improving customer satisfaction and customer loyalty by listening to the "voice of the customer".
There is no significant difference in the mean household incomes between the two neighborhoods +0.05
Find the probability that 665 or fewer college students in the sample send and receive text messages with their phones? Is this result unusual?
At a particular location on a river the number of fish caught per man-hour of fishing effort has a Poisson distribution with ?= 1.3 fish per man hour. Find the following probabilities:
All else being equal, what occurs to your confidence interval when you increase value of alpha?
For each set of data, calculate mean, median, mode, range, interquartile range, standard deviation, and coefficient of variation.
If life of wild pheasants follows a normal distribution with a mean of 9 months and a variance of 9, what percent of the population will be less than 11 months of age.
As a manager of an organization, what statistics would you use and why if you wanted to estimate your annual employee turnover? Be sure to specifically identify the statistical formulas and what additional data you would need to determine your est..
On a test with a population mean of 75 and standard deviation equal to 16, if the scores are normally distributed, what percentage of scores fall below a score of 83.8?
Find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. What is the margin of error?
Find the area under the normal distribution curve between z = 1.52 and z = 2.43.
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