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(1 pt) A random sample of 100 observations produced a mean of x-bar = 23.1 from...

(1 pt) A random sample of 100 observations produced a mean of x-bar = 23.1 from a population with a normal distribution and a standard deviation = 2.42. (a) Find a 90% confidence interval (b) Find a 99% confidence interval (c) Find a 95% confidence interval

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