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likoan [24]
3 years ago
7

(HELP WITH THIS )Suppose ages of cars driven by company employees are normally distributed with a mean of 8 years and a

Mathematics
1 answer:
8090 [49]3 years ago
4 0

Answer:

Let say 75% of  cars older than age  = Y  years

than 25 % cars of age less than Y Years

Z score corresponding to 25 %  =  -0.674

Z score = (Value - Mean) /SD

Value = Y

Mean = 8

SD = 3.2

Z score = -0.674

-0.674 = (Y - 8)/3.2

=> Y =5.84 Years

=> Y ≈ 5.9 Years

Approximately 75% of cars driven by company employees are older than  about 5.9 years

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