kqbdiva kqbdiva

16-02-2017
Mathematics

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A sample from a population with μ = 40 and σ = 10 has a mean of M = 44. If the sample mean corresponds to a z = 2.00, then how many scores are in the sample?

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LammettHash LammettHash

20-02-2017

[tex]z=\dfrac{M-\mu}{\dfrac\sigma{\sqrt n}}\iff 2.00=\dfrac{44-40}{\dfrac{10}{\sqrt n}}\implies \sqrt n=5\implies n=25[/tex]

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