Posted on:

29 Jun 2023


In practice exam 2 question 3 we find DIFFERENT standard deviations?

your solution sir indicates a value of 887.44. But i find in both standard deviations this number: 881,87!

All the other elements are correct though. mean becomes 0. SD becomes 1. exactly because the SDs are equal. But they are equal at 881,87, not, 887.44 for some reason.

Also you can please better explain the 2,7 part being the closest? Thanks in advance.

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