Hi, 

300 values has a normal distribution with a mean of 50 and a standard deviation of 5

What percent of the data is between 45 and 55? 

Note:___________________________________________________________

one  standard deviation from the mean accounts for about 68.2% of the set ***** 

two standard deviations from the mean account for about 95.4%

and three standard deviations from the mean account for about 99.7%.

 

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