If the Standard Deviation, σ Is Known the Z-Distribution Values

question 80

Multiple Choice

If the standard deviation, σ 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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