Mean = 402.5.
Variance = 77,556.3
Standard deviation = 278.5
See attachment for the complete table.
What is the Mean?
The mean of a data is the sum of all data values divided by the number of data values we have in the data set.
What is the Variance?
Variance is calculated by finding the sum of the squares of the deviations from the mean, find the average, then find the average.
What is the Standard Deviation?
The standard deviation = the square root of variance.
The mean of the data given would be: 402.5.
402.5 is subtracted from each of the data points to get the deviations which are squared.
It is the sum of the deviations that gives us 310,225.2.
To find the variance, divide 310,225.2 by the number of data values which is 4.
Variance = 310,225.2/4
Variance = 77,556.3
Standard deviation = √77,556.3
Standard deviation = 278.5
The complete table containing the missing values is given in the image attached below.
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