Question
The completion time of a particular activity follows normal distribution. A sample data on completion times has the following numerical summary: Completion time n Mean
The completion time of a particular activity follows normal distribution. A sample data on completion times has the following numerical summary:
| Completion time | n | Mean | Std. error of mean | St Dev. | Variance | Sum | Margin of error | Precision of confidence interval | |
| X | 50 | 0.05 | ? | ? | ? | 38.4 | 900 | ? | ? |
a) Fill in the missing quantities
b) From this information, construct 95% and 90% two-sided confidence intervals for the population mean.Which of these is more precise and why?
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Dynamical Systems With Applications Using MATLAB®
Authors: Stephen Lynch
2nd Edition
3319068202, 9783319068206
