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17 Jan 2025, 07:50
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
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(N/A)
Question Stats:
100% (01:45) correct
0% (00:00) wrong based on 1 sessions
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On average, the machine operators with approximately how many hours of experience have the same defective part rate as those with 12,000 hours of experience?
(A) 2,000
(B) 2,700
(C) 4,400
(D) 8,400
(E) 12,800
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19 Jan 2025, 10:15
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OE
Because the question specifies “on average,” refer to the curve marked “Average” rather than the individual data points. Machine operators with 12,000 hours of experience produce an average of about 36 defective parts per 1,000. The other group of machine operators that produces about 36 defective parts per 1,000 has a little less than 3,200 hours of experience. (Note that there are 5 grid lines for every 4,000 hours, so each vertical grid line is 800 hours apart. The grid mark to the left of the 4,000 mark represents 4,000 – 800 = 3,200 hours.) Choice
(B) is close to and less than 3,200.
Alternatively, check the average defective part rate for machine operators with the hours of experience listed in the choices:
(A) 2,000 hours (around 33 or 34 defective parts per 1,000)
(B) 2,700 hours (a bit over 35 defective parts per 1,000) CORRECT
(C) 4,400 hours (around 38 defective parts per 1,000)
(D) 8,400 hours (a bit less than 40 defective parts per 1,000)
(E) 12,800 (around 34 defective parts per 1,000)
Because the question specifies “on average,” refer to the curve marked “Average” rather than the individual data points. Machine operators with 12,000 hours of experience produce an average of about 36 defective parts per 1,000. The other group of machine operators that produces about 36 defective parts per 1,000 has a little less than 3,200 hours of experience. (Note that there are 5 grid lines for every 4,000 hours, so each vertical grid line is 800 hours apart. The grid mark to the left of the 4,000 mark represents 4,000 – 800 = 3,200 hours.) Choice
(B) is close to and less than 3,200.
Alternatively, check the average defective part rate for machine operators with the hours of experience listed in the choices:
(A) 2,000 hours (around 33 or 34 defective parts per 1,000)
(B) 2,700 hours (a bit over 35 defective parts per 1,000) CORRECT
(C) 4,400 hours (around 38 defective parts per 1,000)
(D) 8,400 hours (a bit less than 40 defective parts per 1,000)
(E) 12,800 (around 34 defective parts per 1,000)
