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Pract 2,normal distribution curve, community


Pract 2,normal distribution curve, community

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  (1)A group of participants (n=500) have a mean weight of μ =70 k.g , and a standard deviation of σ=5

How many of participant have a weight greater than 80 k.g

-How many of these participants have a weight less than 65 k.g?

How many of these participants have a weight between 60 k.g and 80 k.g?


(2) A group of participants (n=800) have a mean temperature μ =36.5 c, and a standard deviation of σ=0.5 `

How many of participant have a temperature greater than 37 c?

How many of these participants have a temperature less than 36.5 c?

How many of these participants have a temperature between 36 c and 37.5 c?

Answers 

No1

* 2.5% × 500 =12.5




*16% x 500 = 80

 


* 95% × 500 = 475











No 2

*16% x 800 =128

 


              *50% x 800= 400

                 


* 82.5% x 800 =660




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