confidence level 99.40 ? % critical value (za/2) ? 2.97 sample mean 91.30 ? standard error ?
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Question:
confidence level | 99.40 | ? % |
critical value (za/2) | ? | 2.97 |
sample mean | 91.30 | ? |
standard error | ? | ? |
margin of error | ? | 31.48 |
73.70 | ? | |
upper limit | ? | 146.78 |
When constructing the confidence interval a population mean, assuming the population standard deviation is known, we use the following formula:
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