Sonny Has An Average Grade Of 94 That Has A Standard Deviation Of 1.2.3. Kier Has An Average Of 94 T

Sonny has an average grade of 94 that has a standard deviation of 1.2.3. kier has an average of 94 that has standard devotion of 1.45. with the given data, who performed better?

 

Answer:

Step-by-step explanation:

Step-by-step explanation:

given:

X=85

mean=70

standard deviation=2

formula:

X -mean /standard deviation

substitute the given

z = 85-70/2

z= 15/2

z= 7.5

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