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TradeLine, Is an Online Stock-Trading Service

Question 112

Multiple Choice

TradeLine, is an online stock-trading service.To estimate the average number of trades made last month by TradeLine's clients, you take a simple random of 250 clients and find the average number of trades in the sample is 45.8, with a sample standard deviation of 12.3.Show the appropriate 95% confidence interval for the population of TradeLine's clients.Report the upper bound for your interval.


A) 44.83
B) 47.32
C) 52.36
D) 48.72
E) 50.33

Correct Answer:

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