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Suppose a newspaper article states that drinking three or more cups of coffee per day doubles the risk of gall bladder cancer. Before giving up coffee, what questions should be asked by a person who drinks this much coffee?
irwin textile mills produces two types of cotton cloth-denim and corduroy. corduroy is a heavier grade of cotton cloth
Suppose that the service life in hours of a semiconductor is a random variable having a Weibull distribution with α = 0.025 and β = 0.500. (a) How long can such a semiconductor be expected to last?
you have constructed a standardized least-squares regression line to explore how hours worked and stress influence
Why do we want to assume that our sample data represent a population distribution? What are the differences between the binomial and normal distributions?
To test whether or not there is a difference between treatments A, B, and C, a sample of 12 observations has been randomly assigned to the 3 treatments.
Provide an appropriate statistical description and summary of this data set; comment on any distinctive characteristics and postulate potential explanations for your observation.
Is this enough evidence to support Union's position? Use significance level of a = 0.05. You may suppose the mean annual salaries are normally distributed.
describe in words and statistical terms the relationship between the number of years in education and corresponding
the total evaporation amount of a growing season in minneapolis is approximately normally distributed with a standard
suppose the weights of the contents of cans of mixed nuts have a normal distribution with mean 32.4 ounces and standard
an elementary school is offering 3 language classes one in spanish one in french and one in german. these classes are
Sample of 1500 voters was taken and the number who are voting yes is recorded. What is the probability that more than 50% of those 1500 vote yes?
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