The correct statement to represent the comparison between defective parts produced by machines is option d. Machine A usually, but not always, produced fewer defective parts than machine B.
As given in the question,
Number of machines in a factory = 2
Statement compares the :
Number of defective parts produced by machines during first 4 hours
for 19 days.
Observations from the given scatterplot are:
a. Machine A always produced the same number of defective parts as machine B.
False. Variation in producing number of defective parts.
b. Machine A always produced fewer defective parts than machine B.
False.
c. Machine A always produced more defective parts than machine B.
False.
d. Machine A usually, but not always, produced fewer defective parts than machine B.
True. Sometimes like when Machine A produce 7 defective parts machine B produce 5.
e. Machine A usually, but not always, produced more defective parts than machine B.
False.
Therefore, option d) Machine A usually, but not always, produced fewer defective parts than machine B is the correct answer.
The complete question is:
A factory has two machines, A and B, making the same part for refrigerators. The number of defective parts produced by each machine during the first hour of operation was recorded on 19 randomly selected days. The scatterplot below shows the number of defective parts produced by each machine on the selected days.
Which statement gives the best comparison between the number of defective parts produced by the machines during the first hour of operation on the 19 days?
a. Machine A always produced the same number of defective parts as machine B.
b. Machine A always produced fewer defective parts than machine B.
c. Machine A always produced more defective parts than machine B.
d. Machine A usually, but not always, produced fewer defective parts than machine B.
e. Machine A usually, but not always, produced more defective parts than machine B.
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