# Reject Or Fail Why And Probability ? How Do You Know ?

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PaAACCI
ters of P
The sample size for this data set is N = 180. The degrees of freedom (df) is N-2, so 180-2 = 178.
r the 30
Normally, you would use df = 178 and our usual alpha level of .05 to look up feritical in the table on
their atte
page 434 of your textbook; however, the table stops at df = 100. I have calculated it for you: Lcritical=
-.123
. The stu
ed their
I
that you
STEP 3: Calculate your test statistic.
(i.e., it is
Say you calculate it and get Pearson Cobtained = – .209
that you
ork and
, which i
STEP 4: Apply your decision rule.
hey
atistics
gt; Will you reject or fail to reject the null hypothesis?
whether
gt; Why?
reek you
www.cou
gt; Is the probability of getting your robtained by chance greater than or less than .05?
use these
assigned
m Excel int
histogram
gt; How do you know?
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PStatistics and Probability