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A sample of 132 randomly selected students found that the proportion of students planning to travel home for Thanksgiving is 0.66. What is the standard deviation of the sampling distribution?
Assume that a random variable, x, is distributed according to a normal distribution with mean 46 and standard deviation 12. (a) What is the standard error of the estimate, x-bar, if a sample of size 25 is taken?
Describe the Factorial ANOVA multivariate statistical type test and its potential usefulness when testing the impact of more than one independent variable (factor) on one dependent variable. For example the DV is stress. I will need creditable cit..
In many fast food restaurants, there is a strong correlation between a menu item's fat content (measured in grams) and its calorie content. We want to investigate this relationship.
a poll of 200 american adults showed that 144 though that chemical dumps are among the most serious environmental
Calculate the sample proportion of respondents who have a college degree. What is the probability of getting a sample proportion as extreme or more extreme than the one observed in part a if the population has 40% with college degrees?
R.C. Geary wrote some 70 years ago that "Normality is a myth. There never was, is, nor will there ever be a Normal distribution".
Find the probability that a sample of 16 tires will have an average tire life of more than 52000 miles, give that the mean tire life is 50000miles and the standard Deviation is 8489.13.
A random sample of 64 light bulbs indicates a sample mean life of 350 hours. Construct a 95% confidence interval estimate of the population mean life of the light bulbs.
Compute the mean and standard deviation for the sample data in the file Drug$.
When all factors are taken into account, an insurance company estimates that the probability of my father making a claim for damages to his pontoon boat for 5000 is 0.1.
a health researcher is interested in determining whether or not the speed at which people walk is related to their
The Federal minimum wage is $7.25 (effective July 2009). If an employee earns the new minimum wage, how many complaints can that employee expect to receive?
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