A Normal distribution has mean µ = 21 and standard deviation o = 3.2. Find the following. (a) the percent of observations less than 25.6 (b) the percent of observations greater than 16 (c) the percent of observations less than 18.2 (d) the percent of observations between 16 and 18.2

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A: Given that, Mean = 46 Standard deviation = 12

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A: proportion of a normal distribution is located between the mean and z = 2.00

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Q: the mean is 146, and standard deviation is 35. A score of 181 is how many z-scores above the mean?

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Q: For a set of data, μ = 71, X=35, z = -0.60. What is the standard deviation of the population?

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A: The test hypotheses are:Null hypothesis:H0: μ = 4.7.Alternative hypothesis:H1: μ ≠ 4.7.

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