Question

CAn someone show me how to do this:

Answer 1

so here is an example

data set 1 1, 2, 3, what is the mean...?

data set 2 9, 10, 11 what is the mean...?

stanadard deviation uses the gaps between the data... ( this a a very simple explanation).... do the gaps change....?

Answer 2

how could they not change?

Answer 3

well the mean increases by 8 since every score was increased by 8... does that make sense...?

Answer 4

yes it does

Answer 5

ok... now for the standard deviation....

data set 1: 1, 2, 3 mean 2 (1 - 2), (2 - 2), (3 - 2)

data set 2 9, 10, 11 mean 10 (9-10), (10 - 10), (11 - 10)


do the gaps between the mean and each data value change...

Answer 6

yes they do

Answer 7

well actually they don't

data set 1, using score - mean

data values 1, 2, 3, (1 - 2)= -1 (2 - 2) = 0 and (3 - 2) = 1

data set 2 9, 10, 11 (9 - 10) = -1 (10 - 10) = 0 and ( 11 - 10) = 1

so do the gaps change...?

Answer 8

no. but I thought they did

Answer 9

the standard deviation is a measure of spread... so if every score is increased by the same value, then the gaps between the data don't change...

and in the other question, again standard deviation is a measure of spread

the smaller the standard deviation, the closer the data is...

the larger the standard deviation the more spread the data...

hope it helps