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Data from six students relating number of hours of preperation (x) and test score (y) yield a linear correlation coefficient of 0.224. Is there sufficient evidence to support the claim that there is a linear correlation between hours of preparation and test score.
There a flu epidemic that is spreading across SF County. You are a principle and are in charge of 32 teachers. You want to plan ahead and be able to estimate how many substitute teachers the school may need during this epidemic.
Estimate the true weight with an error of 0.03 grams with 99 percent confidence? How to construct a 95 percent confidence interval for the population proportion of positive drug tests. How to tell if the normality distribution?
Using the following 12 numbers (12, 34, 23, 10, 9, 45, 14, 34, 12, 13, 13, 35), calculate 1. the median 2. the mode 3. the mean
Patients who were discharged during the year 2009. Using the information obtained from the sample to predict population characteristics with respect to malpractice litigation is an example of?
A local politician in this town has stated that the average property taxes are $1800 and most people do not pay more than this amount. Conduct a test at the alpha = .01 level to determine if this is true. For this test, consider a sample size of 3..
If the restaurant stocks 400 hamburgers and 150 chicken sandwiches for a given day, what is the probability that it will run out of hamburgers or chicken sandwiches (or both) that day? Assume that the demand for hamburgers and the demand for chick..
When selecting 3 different side dishes from the 16 available choices. What was the incorrect number stated by Joe Montana in the ad?
Male runners follow a normal distribution with unknown mean u and standard deviation o = 5 kg. You compute 95% confidence interval for u. What is the 95% confidence interval for u?
Suppose that the population of heights of male college students is approximately normally distributed with mean m of 68 inches and standard deviation s of 3.75 inches. A random sample of 16 heights is obtained.
What is meant by a probability distribution? Discuss how you could use one of the text probability distribution at your workplace to help solve a business problem.
The level of significance is quantitatively defined as ? and the statistical power of a test is quantitatively defined as 1-?
a companys manufacturing process uses 500 gallons of water at a time. a scrubbing machine then removes most of a
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