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What is minimum sample size required to estimate a mean within 2 with 95% confidence if the sample standard deviation is 20?
Statistics and Probability, Statistics
The mean of the annual return for common stocks from 1926 to 1992 was 16.5%, and the standard deviation of the annual return was 19%. In later parts of the question we will ask: a. What is the probability that the stock ...
What are some examples of "marketing" activities that are associated with the Summer Olympics? How does global marketing and the use of new digital marketing techniques facilitate marketing activities at the Olympics in ...
Ryan Braun has just tested positive for Gorilla Growth hormone. You are his lawyer. Given the following information, do you think you could get him off? Explain your reasoning. P(positive test | drug use) = 0.99 P(positi ...
The weight of the eggs produced by a certain breed of hen has an unknown distribution with a mean of 65 grams and a standard deviation of 5 grams. If you purchase 144 eggs, what is the approximate probability that the av ...
Assume that n = 8, and p = 2/9 1) Find the probability of at least 2 successes and at least 2 failures. 1-56*(2/9)^3*(6/9)^5-70*(2/9)^4*(6/9)^4-56*(2/9)^5*(6/9)^3 wasn't the answer.
What is measured by the numerator of the z-score test statistic?
You work for a firm that manufactures DVD players. Your DVD players last an average of 800 days with a standard deviation of 200 days. You want to set the warranty length such that you only have to replace 1.5% of all th ...
An egg farmer wanted to determine if increasing the amount of time the lights were on in his hand house would increase egg production. For example of 8 chickens he determined the production before and after increasing th ...
Boxes of sugar are filled by machine with considerable accuracy. The distribution of box weights is normal and has a mean of 32 ounces with a standard deviation of only 2 ounces. A quality control inspector takes a sampl ...
Micron Technology Inc. invested into 7 new projects (all of equal size). For each of these project, there is a 75% probability that the project will have a 12% return and a 25% that it will have a -9% return. Each of the ...
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