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Suppose 900 draws are made at random from a box that contained five numbers which were 7, 8, 12, 10, 9. Find the expected value and the SE for the sum. Ave is 9.2 and the SD is 1.72 the expected value is 8120 and the SE for the sum is 50.2 the expected value is 8260 and the SE for the sum is 52.3 the expected value is 8330 and the SE for the sum is 51.3 the expected value is 8280 and the SE for the sum is 51.6 the expected value is 8240 and the SE for the sum is 52.1

You may use the calculator above and this area as scratch paper. To see the solution just click on the button.

Carlos Rodriguez <carlos@math.albany.edu>

This problem was contributed by a student in Elementary Statistics. It is offered as it is with no warranty of any kind
Last modified: Wed May 13 12:29:11 EDT 1998