yes its home work.3 out of 37?s isn't bad .its midnight?

Question

28,19,36,73,37,88,67,33,54,123,79,
12,39,45,22,58,7,73,30,43,24,36,
51,43,33,55,40,29,112,60,94,86,62,
42,29,18,25,41,3,49,102,16,32,46/

Mean

Standard Deviation

Variance

Median

Mode

First Quartile

Third Quartile

Answer 1

C.I.xfd=x-65d^2f*df*d^2
0-1052-603600-1207200
10-20154-502500-20010000
20-30256-401600-2409600
30-40 358-30900-2407200
40-50458-20400-1603200
50-60554-10100-40400
60-706530000
70-807531010030300
80-908522040040800
90-1009513090030900
100-1101051401600401600
110-1201151502500502500
120-1301251603600603600
-75047300

A.M. or average=A+(sigma f*d/sigma f)=65+(-750/44)=47.96

S.D.=[(sigma f*d^2/sigma f)-(sigma f*f/sigma f)^2]^1/2
=[(47300/44)-(-750/44)^2]^1/2
=[1075-290.55]^1/2
=28
variance=784.45
median=l+[((N/2)-m)/f]*c
=40+[(22-20)*10]/8
=42.5
mode =both the classes 40-50 and 30-40 have a frequency of 8 each.i don't know if you can take the average of these two classes as the modal value.if yes then the mode=40

Answer 2

Excel is wonderful for doing this stuff quickly once you've entered your data.

formulas:
mean
=average

standard deviation
=stdev

variance
=var

median
=median

mode
=mode

quartiles
=quartile

See the help sections of Excel if you can't figure out how to complete the formulas.

Answer 3

There's no answer I can give you that would benefit you more than doing the work yourself, and understanding what you're doing.

Answer 4

Frank--bravo. Great answer!!

Answer 5

do it yourself