Use the given confidence level and sample data to find a confidence interval for the population standard deviation σ. Assume that a simple random sample has been selected from a population that has a normal distribution. Salaries of college graduates who took statistics as a course in college 98​% ​confidence; n=81​, x=​$55,500​, s=​$19,346 LOADING... Click the icon to view the table of​ Chi-Square critical values.

Q: b. Now suppose the sample consists of 30 boys instead of 15 and repeat the test. Find the test…

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Q: A survey found that​ 79% of a random sample of 1024 American adults approved of cloning endangered…

A: It is given asSample proportion, p^ = 79% = 0.79Sample size,, p^ = 79% = 0.79Comfidence level = 90%

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A: Given that: Mean = 69 inches Standard deviation = 2.5 inches

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Q: Parts a and b please

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Q: A test has a mean score of 150 and a standard deviation of 12. Soores are normaly distributed. What…

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Q: need help with part a,b,c,d, and e please

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A: From the given information, Sample data = {1, 2, 3, 4} a) All quartiles are calculated as: