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Math i don't know how to do this please help out only answer if you know please

Math i don't know how to do this please help out only answer if you know please
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Math i don't know how to do this please help out only answer if you know please

Math i don't know how to do this please help out only answer if you know please-example-1
User Andrei Fedorov
by
7.3k points

1 Answer

2 votes
I think z-score is -2.56
User Loudrous
by
8.1k points
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