The statistical standard deviation expression refers
to the spread of data about an (average) value
means. You can find the standard deviation of a
sample of data, or the standard deviation of an
entire population. A sample is a subset of a
population. Formulas for the sample standard
deviation and population standard deviation vary
slightly, but it is used to achieve the result
procedure is the same.
Things you need:
1. Make a table with six rows and four columns.
In row a, set the column headings. Column 1 is
number. Column 2 is the Mean of all the numbers in
the Set. Column 3 is number-Mean of all numbers in
the Set. Column 4 is (Number-Mean of all numbers in
the Set).
2. Start filling in the table. The figures used here
are examples. Any numbers will work. In column 1,
put the numbers 6, 4, 7, 8, 0.
3. In column 2 write the mean or the average of 6,
4, 7, 8 and 0 in each blank. 6 plus 4 plus 7 plus 8
plus 0 divided by 5 equals 5, then type 5 in every
inch.
4. In column 3 calculate number minus the Mean,
which means column 1 minus column 2. Goes down, you
should have 1-1, 2, 3, 5.
5. Column 4, calculate (Number-Mean). potency. On
the way down, you should have 1, 1, 4, 9, 25.
6. Add the numbers achieved in column 4. The result
is 40.
7. Divide your answer in step 6 with 5, the number
of entries. The result is 8.
8. Take the square root of your answer in step 7. .
You get your final answer: 2.83. |