monfils 418_hypothesis testing2-2014

984 step3calculatet x 71 565 145 t 330 s 440 44 n 101

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Unformatted text preview: wo
tailed
z‐test
at
the
.05
level
is
±1.96
 z‐‐cont.
 •  Compare
computed
z

to
our
cri$cal
z •  Logic
of
test
 –  Calculate
probability
of
geang
this
mean
if
null
true
 –  Reject
the
null
hypothesis
if
that
probability
is
too
 small
 Using z To
Test
H0

 •  Calculate
z Cont. Using z To
Test
H0

 •  Calculate
z Cont. Step
4:
Draw
Conclusion
 •  Make decision: Step
4:
Draw
Conclusion
 •  Make decision: If obtained z >
+
1.96,
reject H0

 –  See
next
slide
 Step
4:
Draw
Conclusion
 •  Make decision: If z >
+
1.96,
reject H0

 –  See
next
slide
 
3.22
>
1.96

 –  The
difference
is
significant
 •  Because
of
this,
our
conclusion
is
that
we
reject
the
 null
hypothesis.


 •  In
other
words,
watching...
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This note was uploaded on 04/02/2014 for the course PSY 418 taught by Professor Haley during the Spring '08 term at University of Texas.

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