The average gas mileage (mpg) for a Mazda CX-5 is 26 mpg, with a standard deviation of 2 mpg. What percentage of the vehicles produced by Mazda have a gas mileage greater than 24?

Respuesta :

Answer: The percentage of the vehicles produced by Mazda have a gas mileage greater than 24 = 84.13%

Step-by-step explanation:

We assume that gas mileage is normal distribution.

Let x  reprsents the gas mileage.

Given: Mean [tex]\mu[/tex] = 26 mpg , standard deviation [tex]\sigma[/tex] =  mpg

The probability that the vehicles produced by Mazda have a gas mileage greater than 24:-

[tex]P(x>24)=P(\dfrac{x-\mu}{\sigma}>\dfrac{24-26}{2})\\\\=P(z>-1)\ \ \ [z=\dfrac{x-\mu}{\sigma}]\\\\=P(z<1)=0.8413[/tex]

Hence, the percentage of the vehicles produced by Mazda have a gas mileage greater than 24 = 84.13%