Calculate the standard deviation of the data set below. (7, 9, 10, 11, 13) the standard deviation is 4. the standard deviation is 2. the standard deviation is 10.

"The standard deviation is 2"

Step-by-step explanation:

To get Standard Deviation (SD), we follow the steps shown below:

The mean is summing up all the numbers and dividing by the number of numbers. Hence, mean is  

Now,  

Then,  

Next,  

So, the standard deviation is 2

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm