Answer:
6 and - 4
Step-by-step explanation:
Adding up to 2
Multiply to -24
What multiplies to give you 15, and adds to give you -10?
2 answers:
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To compute the mean, you simply have to sum all the elments in the data set and the divide the sum by the number of elements:
To compute the variance, we first need to compute the distance of each element from the mean. To do so, we build a "parallel" dataset, given by the difference of every value and the mean:
Now we need those difference squared:
The variance is the mean of this new vector, so
Finally, the standard deviation is simply the square root of the variance, so you have