Question

three randomly selected households are surveyed. the numbers of people in the households are 1,3,8 assume that samples of size n =2 are randomly selelcted with replacement from the population of 1,3,8. Listed below are the nine different sampls

1,1 1,3 1,8 3,1 3,3 3,8 8,1 8,3 8,8


find the variance of each of the nine samples then summerize the sampling distribution of the variances in the format of a table representing the probability distribution of the distinct variance values

s^2 Probability are
3,3 0 or 1
6.3 1 or 2
12.5 6.3 or 40.5
49 12.3 or 24.5

Answer 1

Do you have Microsoft Excel on your computer?

Answer 2

i dont know maybe i will check

Answer 3

i do but i am not real good at using it

Answer 4

okay well no worries, I'm here to help

Answer 5

you can plug in all of the numbers each in separate boxes

Answer 6

and then type =VAR and click on S for sample or P for population and highlight the numbers

Answer 7

the probablilities or the 1-1 1-3 and so forth

Answer 8

the 1,11,3 1, 83... so on

Answer 9

The variance is the average of the squared differences from the mean. To get the variance, first calculate the difference from the mean for each sample number. Square each number then average the results.

Answer 10

so do that for each section.

Answer 11

down or straight across

Answer 12

it doesn't matter

Answer 13

as long as you separate the 9 different samples

Answer 14

and you said to type VAR after the numbers correct

Answer 15

in an empty box type =VAR and click on S or P depending on the question, in this question S

Answer 16

i am going to post what i got to make sure i understand you

Answer 17

hope you can open it

Answer 18

you didn't plug them in the right way, but here is a very helpful video that will help you throughout statistics using Excel

http://www.youtube.com/watch?v=efdRmGqCYBk