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anonymous
 one year ago
In a population of chickens, the average (arithmetic mean) weight is 6.3 pounds, and the standard deviation is 1.2 pounds. Which of the following weights (in pounds) are within 1.5 units of standard deviation of the mean?
Indicate all weights.
A. 4.4
B. 4.6
C. 5.1
D. 5.2
E. 6.9
F. 7.6
G. 7.7
H. 8.2
anonymous
 one year ago
In a population of chickens, the average (arithmetic mean) weight is 6.3 pounds, and the standard deviation is 1.2 pounds. Which of the following weights (in pounds) are within 1.5 units of standard deviation of the mean? Indicate all weights. A. 4.4 B. 4.6 C. 5.1 D. 5.2 E. 6.9 F. 7.6 G. 7.7 H. 8.2

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0why is it 1.8 instead of 1.7 ??? Why don't you add 0.5 to 1.2??? Why do you multiply 1.5 to 1.2?

mathmate
 one year ago
Best ResponseYou've already chosen the best response.21.5 means one and a half, so one and a half of 1.2 is 1.2*(1.5) or 1.2+0.6=1.8. The mean is 6.3 lb. So withing (plus or minus) 1.5 standard deviations is 6.3\(\pm\) 1.8, or all weights between 4.5 and 8.1lbs.
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