Help with a question: Need someone to explain the way to the answer!

Question

howard-wolowitz · Answer

attachment

howard-wolowitz · Answer

i cant draw a graph for my question i have to describe it

welshfella · Answer

I haven't got enough time to help you with all this 
Remember the median is the middle value
mean = sum of all the values  divided by 7

welshfella · Answer

and the range = highest value - lowest

howard-wolowitz · Answer

so would you suggest I put that all values are the same?

howard-wolowitz · Answer

guys, each time i do it i draw graphs but i wouldnt know how to put them into the words for the answer

welshfella · Answer

the median is the same for all three
- check out the middle value

howard-wolowitz · Answer

i see its 11

welshfella · Answer

right  Have have you worked out each of the mean's?

howard-wolowitz · Answer

no i was trying to figure out what standard deviation was

howard-wolowitz · Answer

i do it now

howard-wolowitz · Answer

A: 11 mean 
B: 11 mean
C:11 mean

howard-wolowitz · Answer

So, thats something thats similar

welshfella · Answer

|dw:1441813625332:dw|

howard-wolowitz · Answer

oh, and the median is the same for all three

welshfella · Answer

right
the above histogram is for  the list C and gives an idea of the distribution of the numbers

welshfella · Answer

yes mean and median are the same

welshfella · Answer

and also the range is the same 17 - 5  = 12  in each case

howard-wolowitz · Answer

oh i missed that

welshfella · Answer

you can draw similar histograms for A and B to show the difference in distribution of the values

welshfella · Answer

the standard deviation is a bit more complicated 
do you know how to work that out?

its values gives an idea of the spread of data within the data set.

howard-wolowitz · Answer

For the standard deviation of "A" I got 4.3

howard-wolowitz · Answer

For the standard deviation for "B" I got 5

howard-wolowitz · Answer

For the standard deviation for "C" I got 6

welshfella · Answer

yes that figures
the spread is not that much different but because of the 3  5's and 3 17's in C  it will be greater that A or B.

howard-wolowitz · Answer

So, my final answer answer is gonna be:
For all three, mean, median and range are the same but standard deviation is different in all three.

welshfella · Answer

yea

welshfella · Answer

- well say  std dev for C is greater than B  and B greater than A.

howard-wolowitz · Answer

ok gotcha

welshfella · Answer

good

howard-wolowitz · Answer

PoWer of the "Welsh minds!" @welshfella  #welsh-power

welshfella · Answer

lol