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Your local newspaper contains a large number of advertisements for unfurnished one-bedroom apartments. You choose 10 at random and calculate that their mean monthly rent is $540 and that the standard deviation of their rents is $80. a. What is the standard error of the mean? b. What are the degrees of freedom for a one-sample t statistic?
ariba ltd produces a range of ground coffee for commercial use within cafeacutes and restaurants. the company is
Find the mean and standard deviation for the number of left-handed students in such classes of 25 students.
a random sample of size 10 is chosen from a population of 100 without replacement if a and b are two indiviuals among
consider a string of bernoulli trials with probability of success equal to p and let y1 be the number of trials untial
the volumes of soda in quart soda bottles are normally distributed with a mean of 32.3 oz and a standard deviation of
suppose the sample size from the normal population is 11. also assume that the population standard deviation is
how is the denominator influenced by sample variability and given this why do we need a larger sample for between
Find a 95% confidence interval for the mean dielectric strength of the oil.
suppose x is uniformly distributed on 410. let uaxb where a and b are constants. find values of a and b such that u is
Such things as historical documents, newspaper reports, TV and radio broadcasts, when used in research, represents
The progress report of a research analyst to the supervisor stated: "All the estimated regression coefficients in our model with three predictor variables to predict sales are statistically significant.
Consider you have completed a survey of employees working in a call center doing customer service for a major manufacturing company.
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