The management is interested to know the percentage of idle time of an equipment. The trial study should that percentage of idle time would be 20%. The number of random observations necessary for 95% level of confidence and + 5% accuracy is:

The management is interested to know the percentage of idle time of an

1.	The management is interested to know the percentage of idle time of an equipment. The trial study should that percentage of idle time would be 20%. The number of random observations necessary for 95% level of confidence and + 5% accuracy is:
A.	6400
B.	1600
C.	460
D.	160
Answer» B. 1600

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The management is interested to know the percentage of idle time of an equipment. The trial study should that percentage of idle time would be 20%. The number of random observations necessary for 95% level of confidence and + 5% accuracy is:

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