Answer:
Range: 36
Variance: 103.69
Standard Deviation: 10.18282868
Step-by-step explanation:
Because we were not told otherwise I think it would be fair to say that everything has an equal probability
Let's start by finding the range
the range is the largest value minus the smallest
40-4=36
Let's then find the variance
the variance is the second moment minus the first moment squared
first moment: .1(10+9+5+7+5+6+4+6+7+40)= 9.9
second moment: .1(10²+9²+5²+7²+5²+6²+4²+6²+7²+40²)= 201.7
201.7-9.9²= 103.69
The standard deviation is simply just the square root of the variance
√(103.69)= 10.18282868
not sure what they meant by the rounding part so I'll leave that to you
