Excel 2013 Statistical Analysis #49: Create Confidence Intervals Sigma Known Z-Score (3 Methods)

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Topics in this video Create Confidence Intervals Sigma known (3 Methods):
1. (00:10) Calculate Sample Size, Mean, , Standard Error, alpha, and Alpha/2
2. (02:37) NORM.INV function
3. (04:03) NORM.S.INV function
4. (05:35) CONFIDENCE.NORM function
5. (06:45) What sort of Statements we can make when we create Confidence Intervals
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Excel 2013 Statistical Analysis #49: Create Confidence Intervals Sigma Known  Z-Score (3 Methods)
Topics in this video Create Confidence Intervals Sigma known (3 Methods):
1. (00:10) Calculate Sample Size, Mean, , Standard Error, alpha, and Alpha/2
2. (02:37) NORM.INV function
3. (04:03) NORM.S.INV function
4. (05:35) CONFIDENCE.NORM function
5. (06:45) What sort of Statements we can make when we create Confidence Intervals

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Great explanation as usual by this Professor, But I just can't visual a scenario where the company would know Sigma without knowing what Mew is first.

timpinckney