« Reply #15 on: October 31, 2010, 07:54:30 pm »
0
for this example ill be using the values: 186, 171,201.
mean=186 , one sd from the mean is achieved by adding 15 to the median and subtracting 15 for median to get 171 and 201.
go to lists and spreadsheets
in the first column type in: 171,186,201
that would give mean=186 sd=15 (check by going to stats ,stat calc, one variable,x1 is that column)
then substitute in 186 as the 4th value in the column, the values of the mean and sd should change to 186 and 12.24 respectively
b) then delete 186 and replace it with 170 so 170 is now the 4th value in the column, record the change in mean and sd. it should be 182 and 14.63 respectively.
c) repeat step b but instead use the value 200.
you legend!!!! thanks heaps
Logged
"Don’t ever let somebody tell you you can’t do something, not even me. Alright? You got a dream, you gotta protect it. People can’t do something themselves, they wanna tell you you can’t do it. If you want something, go get it, period." - Chris Gardner
Home
Help
Search
Login
