Multiple Choice
A company wants to estimate the time its trucks take to drive from city A to city B.The standard deviation is known to be 12 minutes.What sample size is required so that the error does not exceed ±2 minutes,with 95 percent confidence?
A) 12 observations
B) 139 observations
C) 36 observations
D) 129 observations
Correct Answer:
Verified
Correct Answer:
Verified
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