souravp94 wrote:

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

Mean weight = 6.3 lb

Standard deviation = 1.2 lb

Thus, 1.5 times the standard deviation = 1.5 * 1.2 = 1.8 lb

Thus, 1.5 times the standard deviation from the mean refers to the upper limit as 6.3 + 1.8 = 7.1 lb and the lower limit as 6.3 - 1.8 - 4.5 lb

Thus, we need to determine the values between 4.5 lb and 7.1 lb

Answer: B, C, D, E
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