##### population frequency

label Statistics
account_circle Unassigned
schedule 1 Day
account_balance_wallet \$5

population of 700

Class

-20 up to -10

-10 up to 0

0 up to 10

10 up to 20

Frequency

.32

.22

.36

.10

Feb 11th, 2015

Feb 11th, 2015

Sorry....find mean variance standard deviation

Feb 11th, 2015

mean=-2.6

variance=111.6

standard deviation=10.564

Feb 11th, 2015

Feb 11th, 2015

Thank you....can u plz send details on how u got answer

Feb 11th, 2015

 class frequency(f) midpoint(x) fx x^2 fx^2 -20-10 32 -15 -480 225 7200 -10-0 22 -5 -110 25 550 0-10 36 5 180 25 900 10-20 10 15 150 225 2250 sum of f=100 sum of fx=-260 sum of fx^2=10900

mean =sum of fx/sum of f

=-260/100=-2.6

variance =(sum of fx^2/sum of f)-(sum of fx/sum of f)

=(10900/100)-(-260/100)

=109-(-2.6)

=109+2.6

=111.6

standard variance=square root of variance

standard variance=10.564

Feb 11th, 2015

hey...i have done the work

Feb 11th, 2015

have you seen the work?

Feb 11th, 2015

Yes....will review for my understanding.. I appreciate your help

Feb 11th, 2015

can i please get the payment..?

Feb 11th, 2015

Will send later this evening

Feb 11th, 2015

ok

Feb 11th, 2015

...
Feb 11th, 2015
...
Feb 11th, 2015
Oct 17th, 2017
check_circle