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SCAN0010 - /’ A real example Observations — When the...

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Unformatted text preview: /’\ A real example - Observations: — When the number of bulbs is plotted against specified time intervals of their life- time, invariably, a gaussian shape is obtained. Why? — Some bulbs will take shorter than 800 hours, while others will last even longer than 800 hours. — But there seems to be a central tendency. is a-z‘z’séw‘ on” " Gaussian Distribution Gaussian tendency is due to random errors. Two parameters, mean and standard deviation, characterize the gaussian shape: Mean: a measure of the central tendency it y: H n Standard Deviation: how closely the data are clustered about the mean. (n-1) = degree of freedom, S} = variance ...
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