Question
A service center randomly selected 20 calls on Monday to calculate the average call length. The next day, Tuesday, another 20 calls are randomly selected
A service center randomly selected 20 calls on Monday to calculate the average call length. The next day, Tuesday, another 20 calls are randomly selected to estimate the average call length and see if it is different than Monday. On Wednesday, 20 more calls are randomly selected to estimate average call length to see if it has changed. This procedure is repeated on Thursday to estimate average call length. On Friday, once more 20 calls are selected and measured to determine if average call length has changed.
Which of the following correctly describes this situation?
| the service center has taken 20 samples repeated five times |
| the service center has taken 5 samples with 20 observations each |
| the service center has taken 1 sample with 100 observations |
| the service center has taken 100 samples in total |
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Linear Algebra A Modern Introduction
Authors: David Poole
4th edition
1285463242, 978-1285982830, 1285982835, 978-1285463247
