The salary for workers at a company are normally distributed with a mean of $60,000 and a standard deviation of $18,000. A random sample of 36 employees was taken. Find the probability that the average salary is over $66,000 Round to 3 d.p.
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The standard error of the mean (SEM) is calculated by dividing the standard deviation by the square root of the sample size. SEM = standard deviation / √sample size SEM = 18,000 / √36 SEM = 18,000 / 6 SEM = 3,000 Show more…
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