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Suppose you are sampling from a population with population variance σ2= 1,000,000. You want the standard deviation of the sample mean to be at most 25. What is the minimum sample size you should use?
peter applied to an accounting firm and a consulting firm. he knows that 30 of similarly qualified applicants receive
A box contains 6 red and 9 green marbles. You reach in and remove 3 marbles all at once. (a) Find the probability that these 3 marbles are all red. (Enter your answer as a fraction.)
what does bivariate normal distribution mean? explain in words or illustrate with a
A sample of 450 responses is shown in worksheet "Proportion". Develop a 90% confidence interval estimation for proportion of "Yes". Then, Enter "Response of Interest" (Yes), and Excel formulas for "Count for Response" (COUNTIF()) and "Sample Size" ..
A random sample of 7 students selected from a large class revealed the following scores: midterm 70, 62, 57, 68, 89, 63, 82 and on the final 80, 79, 87, 88, 85, 79, 91. Is there evidence of an improvement on the final?
Assume the cholesterol levels of adult American women are normally distributed with a mean of 190 mg/dL and a standard deviation of 26 mg/dL. What level would represent the 10th percentile?
a.) Construct a frequency distribution table and a pie chart for this data. b.) What category comprises most of the sample?
What is the probability that a randomly chosen U.S. adult invests in stocks, given that s/he invests in fixed income instruments? Round your answer to decimal places.
A random sample of 200 people was taken. Sixty percent of the people favor President Obama. The 95% confidence interval for the true population of people who favor Obama is?
If one of the Titanic passengers is randomly selected, find the probability of getting a woman or someone who didn't survive the sinking.
what is a numerial value that characterize some aspect of a population?a. estimatorb. parameterc. statisticd.
Rivets used to secure the stainless steel sheet metal of aircraft wings are designed to withstand certain shearing forces. It is knownthat because of random variations in location the load on a rivet is Weibull distributed with a scale parameter of 7..
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