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April 23, 2009
It is E370 Time!!!
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Announcements
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WarmUps Questions
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Today’s Goals: You should be able to
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calculate and interpret pvalues.
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recognize Type I error.
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correctly establish hypotheses to allow the probability of Type I error be under your
control.
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recognize Type II error.
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correctly establish hypotheses so that the consequences of the probability of Type II error
not being under your control are minimized.
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Next Time~~Least Squares Revisited
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Announcements
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PreLab Quiz for Chapter 10:
Remember that question 4 needs a sample size, and you
are to use n=9.
Also, since the sample is so small, you must assume that the population
is normally distributed in order to do this problem.
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Monday, April 13 at 8:00 AM all scores from WarmUps for Lesson 11 through scores from
last week’s evening exam will be frozen.
Check your scores as soon as possible and
follow the instructions in the syllabus if you believe you have found an error.
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 Winter '09
 STAFF
 Economics, Null hypothesis, Statistical hypothesis testing, Type I and type II errors, type ii error, H0 Reject H0

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