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Fix typo purchaces -> purchases #153

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Fix typo purchaces -> purchases #153

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2 changes: 1 addition & 1 deletion 06_StatisticalInference/homework/hw4.Rmd
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Expand Up @@ -171,7 +171,7 @@ setting.

--- &multitext

Suppose that in an AB test, one advertising scheme led to an average of 10 purchases per day for a sample of 100 days, while the other led to 11 purchaces per day, also for a sample of 100 days.
Suppose that in an AB test, one advertising scheme led to an average of 10 purchases per day for a sample of 100 days, while the other led to 11 purchases per day, also for a sample of 100 days.
Assuming a common standard deviation of 4 purchases per day.
Assuming that the groups are independent and that they days are iid, perform a Z test of
equivalence.
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