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A researcher is interested in estimating the average salaries of police officers in a large city. She wants to be 95% confident that her estimate is correct. If the standard deviation is $1050, how large a sample is needed to get the desired information and to be accurate within $200
For the confidence interval (5.15, 8.15) what is the margin of error?
a new grug had a potency advertised at 75. given the following smaple datan25x bar 76.6s1a check manufacturers claim
As a part of your proposals. you need to submit demographic information to help demonstrate that the location chosen by the management teams will be a good investment.
A random variable X is normally distributed with mu = 60 and standard XXX = 11. What is zscore for X = 71
Using a single-server queuing system with Poisson arrivals of 10 units per hour and a constant service time of 2 minutes per unit. How do I go about calculating how long the customer waiting time will be in seconds, on average?
A machine manufactures tires with a tread thickness that is normally distributed with mean 10 millimeters (mm) and standard deviation 2 mm.
If the average importance were computed for each group, would you expect the sample means to be similar or different? What was the total sample size in this study?
Explain whether p^ or p is the correct statistical notation for each proportion described: The proportion that is left-handed in a sample of n = 250 individual.
According to Krantz, the probability of being injured by lightning over the average lifetime is 19100. Show how that probability should relate to your answer.
Construct a contingency table for the relationship between degree of anger and the incidence of heart disease.- Among those with no anger symptoms, what percentage had coronary heart disease?
Search the Internet. Search the Internet or your library to find a study that is interesting to you and that used one-way ANOVA to analyze the data.
If we find a correlation of +.50 between desired age for retirement and current age, how much of the variance in desired age of retirement is predicted from current age. How much variance is left unexplained?
If I obtain a score of 100 on a test that has a mean of 120 and a standard deviation of 10, what is my standard score?
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