If the Standard Deviation Is Known, the Z Distribution

question 27

Multiple Choice

If the standard deviation is known, the z distribution values may not be used to determine interval estimates for the population mean when

• A) n < 30.
• B) the distribution is not normal.
• C) the distribution is skewed.
• D) n is big.
• E) n is small (<30) and the distribution is not normal.

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Definitions:

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Social Isolation

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