When a Proportionate Stratified Sampling Plan Is Used,the Weighted Mean

question 67

Multiple Choice

When a proportionate stratified sampling plan is used,the weighted mean formula:

• A)should be used to ensure statistical efficiency.
• B)should be calculated using the weights represented by the proportions.
• C)should not be used.
• D)should be used if the sample size is greater than 100.
• E)should be used only if time constraints permit.

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