Question 903707: The mean gas mileage for a hybrid car is 56 miles per gallon. Suppose that the gasoline mileage is aprox normally distributed with a standard diviation of 3.2 miles per gallon. Round 3 decimal places. a) what is the probability that a randomly selected hybrid gets more than 61 miles per gallon? b)what is the probability that a randomly selected hybrid gets more than 50 miles per gallon or less? c) what is the probability that a randomly selected hybrid gets between 58 and 61 miles per galon? d) what is the probability that a randomly selected hybrid gets less than 45 miles per gallon?
Answer by ewatrrr(24785)   (Show Source):
You can put this solution on YOUR website! P(x < value) = P(x ≤ value).
TI syntax is normalcdf(smaller, larger, µ, σ).
Note: The -999 is used as the smaller value to be at least 5 standard deviations from the mean.
a) what is the probability that a randomly selected hybrid gets more than 61 miles per gallon?
1- normalcdf(-999,61,56,3.2)
b)what is the probability that a randomly selected hybrid gets more than 50 miles per gallon or less?
nomalcdf(-999, 50,56,3.2)
c) what is the probability that a randomly selected hybrid gets between 58 and 61 miles per gallon?
normalcdf(58,61, 56,3.2)
d) what is the probability that a randomly selected hybrid gets less than 45 miles per gallon?
normal(-999,44,56,3.2)
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