Set A of six numbers has a standard deviation of 3 and set B of four numbers has a standard deviation of 5. Both sets of numbers have an equal mean. If the two sets of numbers are combined, find the variance.

Given:

To find:

The variance. of combined set.

Solution:

Formula for variance is

     ...(i)

Using (i), we get

Similarly,

Now, after combining both sets, we get

Therefore, the variance of combined set is 15.4.

what are you doing do you need examples of variable questions?

step-by-step explanation:

5a-1=9               bring the one over the =

5a=10                     divide by your variable

a=2

brainliest? ?

here try this one

3a-24=0

you bought 31 v bucks

step-by-step explanation:

25+6=31