Use the given information to find the minimum sample size required to estimate an unknown population mean μ.

Margin of error: $126, confidence level: 99%, σ = $512

Question

Use the given information to find the minimum sample size required to estimate an unknown population mean μ.

Margin of error: $126, confidence level: 99%, σ = $512

yanasidlinskiy · Answer

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yanasidlinskiy · Answer

Margin of Error (half of confidence interval) 	136	
The margin of error is defined as the "radius" (or half the width) of a confidence interval for a particular statistic.	
Level of Confidence $\huge{\rightarrow}$ 99	
s = Sample standard deviation $\huge{\rightarrow}$ 512

yanasidlinskiy · Answer

'z critical value' from Look-up Table for 99% What's the #?

anonymous · Answer

2.6

yanasidlinskiy · Answer

Ok. When you have 2.6,
significant digits	2	
Margin of Error = ('z critical value') * $$\frac{ s }{ \sqrt{n} }$$
n = .....?

anonymous · Answer

How do you get n?

yanasidlinskiy · Answer

2.6 * $$\frac{ s}{ \sqrt{n} }$$

yanasidlinskiy · Answer

Mulitply.