Answered

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Xavi wants to measure the impact of using water for irrigation on a stream's flow rate. The flow rates both
upstream and downstream of the irrigation point are normally distributed,
For each location, Xavi selects a random time each month and measures the flow rate in liters per second.
After he has 12 samples per location, he will look at the difference (upstream - downstream) in their
sample means
What do we know about the shape of the sampling distribution of WU - ip, and why?

Sagot :

Answer:

exactly normal

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