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.