Question

Try These
1.
Estimate the arithmetic mean of the following data
(1)
17, 25, 28, 35, 40
()
5, 6, 7, 8, 8, 10, 10, 10, 12, 12, 13, 19, 19, 19, 20
Verify your answers by actual calculations.​

Answer 1

Answer:

Step-by-step explanation:

A=20

N=15

[Xi-A]

= [5-20]=[5[6-20]+[7-20]+[8-20]+[8-20]=[10-20]+[10-20]+[10-20]+[12-20]+[12-20]+[13-20]+[19-20]+[19-20]+[19-20]+[20-20]

= -15-14-13-12-12-10-10-10-8-8-7-1-1-1+0

= -122

therefore x bar is A+∑[Xi-1]\N

                           =20+[-122]\15

                           =[20*15]-122/15

                           =300-122/15

                           = .1187[estimated]

METHOD 2:

= 5+6+7+8+8+10+10+10+12+12+13+19+19+19+20\15

= 178/15

= 11.87[estimated]

FOLLOW ME FOR MORE CORRECT ANSWERS

AND MARK ME AS BRILLIANT