savannnab1890
15.10.2020 •
Mathematics
i dont get how i need help for something but yall wanna limit the times i come back to for the answer it blocks the answer and i only used it 3 times today i am never using this again.
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Ответ:
That happens with me but I always try again the next day
Step-by-step explanation:
Ответ:
0.17879
Step-by-step explanation:
This is a normal distribution problem
The mean rates of gasoline per gallon for the US is
μ = $3.73
Standard deviation = σ = $0.25
The probability that a randomly selected gas station in the United States charges less than $3.50 per gallon = P(x < 3.5)
We first normalize/standardize/take the z-score
The standardized score for any value is the value minus the mean then divided by the standard deviation.
z = (x - μ)/σ = (3.50 - 3.73)/0.25 = - 0.92
To determine the probability that a randomly selected gas station in the United States charges less than $3.50 per gallon = P(x < 3.50) = P(z < -0.92)
We'll use data from the normal probability table for these probabilities
P(x < 3.50) = P(z < -0.92) = 0.17879
Hope this Helps!!!