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19. The mean of a dataset is 80 and standard deviation of 5. Approximately what percentage...

19. The mean of a dataset is 80 and standard deviation of 5. Approximately what percentage of data is between 75 and 85?

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Answer #1

z score for 75 is :-

z score for 85 is :-

[ according to the empirical rule, we know that, approximately 68% of data lies within 1 sd of the mean .

here, 75 and 85 are 1 sd below and above the mean..so there is 68% of data between 75 and 85]

Approximately 68 percentage of data is between 75 and 85.

*** if you have any doubts about the problem please mention it in the comment box... if satisfied please LIKE.

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