(Answered) The scores on a hypothetical vocabulary test of a group of

Statistics

The scores on a (hypothetical) vocabulary test of a group of 20 year olds and a group of 60 year olds are shown below.

20 year olds: 27 26 21 24 15 18 17 12 13

60 year olds: 26 29 29 29 27 16 20 27

Test the mean difference for significance using the .05 level.
List the assumptions made in computing your answer.

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