Question

a data set has a mean of 50 and a standard deviation of 10. if the distribution is symmetrical then what percent is between (20,80)?

choices are: 68%, 75%, 95%, 88.89%, 99.7%

Answer #1

[ *explanation*:-

mean () = 50 , sd () = 10

*z score of 20
:-*

*z score of 80
:-*

**according to the empirical rule approximately 99.7 % of
data lies woithin 3 sd from the mean**.

so, **here,
approximately 99.7 % of data are there between
(20,80).** ]

*** if you have any doubt regarding the problem ,please write it
in the comment box...if satisfied,please
**UPVOTE.**

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