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Earn +20 ptsQ: How do you Derive the mean and variance of beta?
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When a coin is tossed four time then mean and variance of the number of the head?
Mean = 2. Variance = 1.
Is variance based on deviations from the mean?
Variance is the squared deviation from the mean. (X bar - X data)^2
What is the sample variance with the mean of 190.3?
The mean, by itself, does not provide sufficient information to make any assessment of the sample variance.
How is standard deviation found?
Formally, the standard deviation is the square root of the variance. The variance is the mean of the squares of the difference between each observation and their mean value. An easier to remember form for variance is: the mean of the squares minus the square of the mean.
If the mean of a normal distribution is negative what is the varience?
The variance is always positive. The variance is not directly related to the sign (nor magnitude) of the mean.
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