SUPPOSE WE have a population of N = 25 observations with mean Equal to 80 and standard deviation equal to 5. It is known that the population is...

Can anyone explain why E? This is QMS442 chapter 4, but I don't understand

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Q10 : SUPPOSE WE have a population of N = 25 observations with mean Equal to 80 and standarddeviation equal to 5. It is known that the population is normally distributed . Find the nearest probabilitythat Is will be larger than $ 2 .1 1 1019$1 2.576170