A population of values has a normal distribution with �=51.8 and �=56.5. A random sample of size �=199 is drawn. What is the mean of the distribution of sample means?��¯= Incorrect What is the standard deviation of the distribution of sample means? Round your answer to two decimal places.��¯=

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Q: A score of is 3 standard deviations above the mean.

A: Let , X→N(μ=140 , σ=28) Our aim is to find the score 3 standard deviation above mean

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Q: n = 11 Ex=55 Ex²=2230 Give the value of the sample standard deviation.

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A: #  Here given that        X~Nμ,σ  and        z=x-μσ→                    1 So according to equation…

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A: The complete solution is given below

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A: Given: μ = 500 σ = 100

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A: P10 , the score separating the bottom 10% from the top 90% is -21.8Explanation:

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A: Class  frequency (f) Mid vaue (x) f.x f.x2 0-199 342 99.5 34029 3385885.5 200-399 86 299.5 25757…

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A: The importance of standard normal curve lies in the fact that one has not to tabulate probability…