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You want to know the mean number of shirts students in your county own. At each of five schools you randomly survey ten students. Your results are shown. Use all five samples to make one estimate for the mean number of shirts students in your county own.

A: 14, 12, 7, 9, 8, 5, 10, 22, 25, 10
B: 10, 12, 15, 12, 9, 6, 5, 10 11, 7
C: 12, 15, 14, 13, 19, 17, 15, 9, 9, 9
D: 9, 5, 10, 12, 11, 15, 16, 14, 9, 8
E: 16, 11, 14, 13, 19, 8, 16, 15, 15, 13

__ Shirts

Sagot :

dignoris

A: 14+12+7+9+8+5+10+22+25+10 =122÷10=  12.2

B: 9, 10, 12, 13, 13, 13, 15, 15, 16, 16, 18, 22, 23, 24, 24, 25 = 16.75

C:12, 15, 14, 13, 19, 17, 15, 9, 9, 9 = 13.2

D:  9, 5, 10, 12, 11, 15, 16, 14, 9, 8 = 10.9

E: 16, 11, 14, 13, 19, 8, 16, 15, 15, 13 = 14.5

The total mean is 67.55 shirts ,which also goes to 8

Your answer is 8 !

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