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A sample of size 500 gave a sample proportion of 0.3. What is the standard error of the sample proportion? Give your answer to four decimal places.
students who live in the dorms at a college get free t.v. service in their rooms but only receive 6 stations. on a
let the experiment be the toss of three dice in a row.let x be the outcome of the 1st die.let y be the outcome of the
A random sample of n=100 observations is selected from a population with mean of 29 and sandard deviation of 21. Approximate the probabilities shown below
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities.
1 a student studying for a vocabulary test knows the meanings of 14 words from a list of 20 words. if the test contains
a manufacturer of college textbooks is interested in estimating the strength of the bindings produced by a particular
The waiting times have a standard deviation of 5.7 minutes. Use a 0.025 significance level to test the claim that with a single line, waiting times vary less than with individual lines.
Does your analysis change if the term "average" refers to the mean? To the median? Explain what effect this misinformation might have on the perception of the nation's schools.
in order to determine how many hours per week freshmen college students watch television a random sample of 256
Survey of 8000 women, 5431 say they change their nail polish once a week. construct a 95% confidence interval for the population proportion of women who change their nail polish once a week.
Suppose that you are conducting a survey of customer satisfaction regarding their cellular phone. If you called 11 households selected at random, what is the probability that:
a company is criticized because only 17 of 48 executives at a local branch are women. the company explains that
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