Standard Deviation For Beginners
69
Standard Deviation
Thought I would write a hub on how I learnt standard deviation with some examples, which will hopefully help you understand it a bit better.
Standard deviation or SD for short is utilized to measure dispersion. It gives the researcher an indication as to how far an individual score is, which is scattered or spread around the means.
The means score/value is the most representative score, however, it will not show how or where the other values lie in relation to it.
Standard Deviation tells the researcher:
How much (on average) an individual score is in the set differ from the ‘means'.
It can be calculated by hand but with the invention of computer technology it is a lot easier by computer.
If using a scientific calculator: Switch on
Shift + SCL or ON
Put your numbers in + m+ end with m+
Shift 1 = means
Shift 2 = standard Deviation
Example:
33, 31, 19, 18, 14, 60, 34, 39, 42, 42, 28, 25, 24, 27, 33, 32, 20, 40, 40
X = 31.77
Standard Deviation = 10. 4
An example of Standard Deviation with the Mean, Mode and Median
20, 21, 23, 25, 26, 27, 27, 30, 31, 32, 34, 37, 38, 39, 41, 42, 44, 45, 45, 46, 48,48, 48, 50, 55, 56, 58, 58, 58
Mean = 39.6
Mode = 40
Median = 48, 58
Standard Deviation = 11.49
X = 11.5
vote upvote downshareprintflag
- Useful (3)
- Funny
- Awesome (3)
- Beautiful (2)
- Interesting (1)
Help me refresh the SD.
this sight doesn't help the least bit. i am trying to learn how to calculate standard deviation and it doesn't say how it just gives u the value.
Thanks :Di understand it more now :D
If an example is going to be given you need all steps in there. I looked at the example and it doesn't tell me how you came up with the answer. For those who have a hard time with trying to understand math need a better break down of how the answer is given.
no comments...lollololol9l0lololol9lolololo
This is useless. Hilariously so.
Helpful! Cheers.
looks good, but it didnt help. I need to know how you apply the formula to this example. That would help!
if you are going to teach, come down to our level. don't try to impress us with your skill and knowledge-break it down for us in simple terms, step by step. this is what makes a good and effective teacher!
I thought the Mean was the average and the Mode is the most represented score...
dr_mina 4 years ago
thank you