Statistics homework

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The histograms of some sampling distributions are symmetrical. T-F What would make a histogram symmetrical, and give an example of a symmetrical distribution?

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A random sample of size 36 is to be selected from a population that has a mean μ = 50 and a standard deviation σ of 10.

 

Find the standard (z) score for a sample value of 40.

 

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    Dr NAPOLEON
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