f********g
发帖数: 1 | 1 Task 1:
You are considering to take over a business depending on the turnover in
swiss francs. A sample of 40 business days shows the standard deviation of
571.9. For how many days do you have to extend your sample to secure by 85%
that the deviation is no more than 100?
是什么分布，该如何计算？
27.815 Days (28 days)?
Task 2:
You plan to calculate the standard income of Swiss workers. The average of
100 workers is 70'000 with a standard deviation of 20'000. How many workers,
in addition, do you have to ask |
|
