a If a rifleman\'s gunsight is adjusted incorractly, he might shoot bullets cons

Question

a If a rifleman's gunsight is adjusted incorractly, he might shoot bullets consistently close to 2 fset laft of the bull's-eye targst Draw a skatch of tha target with the bullet holes Does this show lack of precision or bias? b Draw a sacond sketch of the target if the shots are hoth unbiasad and precise (have lite variation) The rifleman's aim is not perfect, so your skatches should showme than one bullethole a. Draw a sketch of the larget with the bullet holes consistently close to 2 Teet lelt of the bulfs-eye targel. Choose the corect large b. Note hat the diameler f the target is 3 fee O A. ??. ??. O D. Does this show lack of precision or bias? O A. Both bias and lack of precision OB. Bias ° C. Neither hias or lack of precision O D. Lack of precision b. Draw a second sketch of the larget if the shols are both unbiased and precise ??. ??. OC

Explanation / Answer

a)
option D) is correct sketch
as he shoots consisitently , all shots are close to each other and sice they are 2 ft left D) is correct

Bias is the average difference between the estimator and the true value. Precision is the standard deviation of the estimator.
this is biased and precise

b)
unbiased and precise
D) is correct

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