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[2] 2. A random sample of 55 door-to-door salespersons were asked how long on average they were able to talk to the potential customer. Their
[2] 2. A random sample of 55 door-to-door salespersons were asked how long on average they were able to talk to the potential customer. Their answers revealed a mean of 9.5 minutes with a variance of 9 minutes. Give a point estimate for the average conversation length and the margin of error
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