Platforms
Based on the model (curve) provided we can estimate that the mean is μ = ºF, that the curve changes concavity around a value of ºF, which is ºF below the mean, so the standard deviation of this distribution is approximately σ = ºF.
About 68% of the observations will fall within points of the mean of points.
1.5
88
About % of the observations will fall within 3 points of the mean.
95
About 99.7% of the observations will fall within points of the mean.
4.5
What percent of observations are expected to fall between 2 and 3 standard deviations above (or below) the mean?
What percent of oil changes take less than 60 minutes?
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Normal Distributions
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Finding Values from Probabilities