Teach Me Video Assignment Researchers designed an experiment to study the effects of caffeine withdrawal. They recruited 23 volunteers who were diagnosed as being caffeine-dependent to serve as...


Teach Me Video Assignment


Researchers designed an experiment to study the effects of caffeine withdrawal. They recruited 23 volunteers who were diagnosed as being caffeine-dependent to serve as subjects. Each subject was barred from coffee, colas, and other substances with caffeine for the duration of the experiment. During a two-day period, subjects took capsules containing their normal caffeine intake. During another two-day period, they took placebo capsules. The order in which subjects took caffeine and the placebo was randomized. At the end of each two-day period, a test for depression was given to all 23 subjects. Researchers wanted to know whether being deprived of caffeine would lead to an increase in symptoms of depression at a level of significance 0.03.


The data set is in the Google Spreadsheet. The higher scores show more symptoms of depression.



Data: Google Spreadsheet



GeoGebra Spreadsheet



GeoGebra Probability Calculator




Carry out a test to investigate the researchers’ questions.



Step 1
:State the
claim
and its opposite. Identify which is the
null hypothesis
and which is the
alternative hypothesis
.



Step 2
:
Determine
which hypothesis test
you will use and
check conditions
.



Step 3
:If the conditions are met, perform the
calculations,
and
conduct the test
.Include the
test statistic
and the
P-value
.



Step 4
:State the result and
interpret
your result in the
context
of the problem. In the conclusion, please make sure to address this question: why did researchers randomly assign the order in which subjects received placebo and caffeine?



Upload an image of your Geogebra work to illustrate all the steps need for this problem.

Jul 13, 2021
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