Question
TEST 3: z-test.THE IQ PILL: DOES IT AFFECT IQ? Say we randomly selected 100 people, gave them an IQ pill that we predict affects IQ,
TEST 3: z-test.THE IQ PILL: DOES IT AFFECT IQ?
Say we randomly selected 100 people, gave them an IQ pill that we predict affects IQ, measured their IQ, and found their mean ) to be 108 where = 103 and = 12
Steps
1.Determine the experimental hypothesis and create the statistical hypothesis
ExperimentalStatistical
2.Set up the sampling distribution.
Select
Locate region of rejection
Determine critical value
3.Compute the and
=
4.Compare and
If lies beyond then reject , accept , and say the results are "significant."Then describe the relationship.
Ifdoes not lie beyond , do not reject , and say the results are "nonsignificant."
Do not draw any more conclusions about the relationship.
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