Question
In: Statistics and Probability
Dr. Lewis investigated the effects of caffeine consumption and sleep deprivation on mental alertness. He recruited...
Dr. Lewis investigated the effects of caffeine consumption and sleep deprivation on mental alertness. He recruited 30 college students to participate in his study. He had each student stay in the lab overnight. One-third of the sample was allowed a full night’s sleep (no sleep deprivation), one-third was woken up two hours earlier than usual (2 hours sleep deprivation), and the other one-third was woken up four hours earlier than usual (4 hours sleep deprivation). Within 30 minutes of waking up, half of the participants were given 150 mg of caffeine (the same as a standard cup of coffee) and the other half were given nothing. One hour after waking up, all participants took a mental alertness task. Dr. Lewis began to copy his ANOVA source table from his computer output, but had to leave the office before it was completed. His lab manager needs the results ASAP and asks you to finish the incomplete table.
|
Source |
SS |
df |
MS |
F |
|
Caffeine |
228 |
|||
|
Sleep Deprivation |
710 |
|||
|
Caffeine x Sleep Deprivation |
||||
|
Within |
24 |
45 |
-- |
|
|
Total |
4,538 |
-- |
-- |
Complete the source table for the lab manager. Using the source table, what do you conclude about the effects by looking at the F values using α = .05?
Solutions
orchestra answered 2 years agoRelated Solutions
Dr. Lewis investigated the effects of caffeine consumption and sleep deprivation on mental alertness. He recruited...
Dr. Lewis investigated the effects of caffeine consumption and
sleep deprivation on mental alertness. He recruited 30 college
students to participate in his study. He had each student stay in
the lab overnight. One-third of the sample was allowed a full
night’s sleep (no sleep deprivation), one-third was woken up two
hours earlier than usual (2 hours sleep deprivation), and the other
one-third was woken up four hours earlier than usual (4 hours sleep
deprivation). Within 30 minutes of waking...
A researcher is interested in the effects of sleep deprivation and caffeine intake on mood. Participants...
A researcher is interested in the effects of sleep deprivation
and caffeine intake on mood. Participants were randomly assigned to
a sleep condition (normal or deprived) and a caffeine condition (0
cups, 2 cups, or 4 cups). After the manipulations, mood was
measured (such that higher numbers indicated better mood). The
results were as follows:
Normal
Condition
Deprived Condition
0
cups 2
cups 4
cups
0 cups 2
cups 4 cups
16
18
18
0 ...
A researcher is interested in studying the effects of sleep deprivation on testing performance. He randomly...
A researcher is interested in studying the effects of sleep
deprivation on testing performance. He randomly assigns 6 students
to either sleep for a normal amount of hours or not sleep at all on
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Sleep:94 98 96 No Sleep:87 84 81
) In a study of the effects of caffeine on alertness, 32 subjects were randomly assigned...
) In a study of the effects of caffeine on alertness, 32
subjects were randomly assigned to four groups. These groups were
C1: wait-list control (no treatment), C2: placebo control, E1:
experimental group 1 (mild caffeine treatment) and E2: experimental
groups 2 (high caffeine treatment). Several subjects were not able
to complete the study, reducing the group n’s to 7, 5, 6, and 3,
respectively. The dependent variable scores were performance scores
on a visual-motor task requiring alertness. The results...
1) In a study of the effects of caffeine on alertness, 32 subjects were randomly assigned...
1) In a study of the effects of caffeine on alertness, 32
subjects were randomly assigned to four groups. These groups were
C1: wait-list control (no treatment), C2: placebo control, E1:
experimental group 1 (mild caffeine treatment) and E2: experimental
groups 2 (high caffeine treatment). Several subjects were not able
to complete the study, reducing the group n’s to 7, 5, 6, and 3,
respectively. The dependent variable scores were performance scores
on a visual-motor task requiring alertness. The results...
Research Scenario: A researcher is attempting to determine the effects of sex and sleep deprivation on...
Research Scenario: A researcher is attempting
to determine the effects of sex and sleep deprivation on a reaction
time task. Participants (5 men; 5 women) in an experiment are given
a computerized search task. They search a computer screen of
various characters and attempt to find a particular character on
each trial. When they find the designated character, they press a
button to stop a timer. Their reaction time (in ms) on each trial
is recorded (note, so the lower...
A team of cognitive psychologists studied the effects of sleep deprivation on decay of short-term memory....
A team of cognitive
psychologists studied the effects of sleep deprivation on decay of
short-term memory. Eight participants stayed in a lab for 2 days.
Four were randomly assigned not to sleep during that period. The
other four were allowed to sleep when they wanted to do so. At the
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An article investigated the consumption of caffeine among women. A sample of 52 women were asked...
An article investigated the consumption of caffeine among women.
A sample of 52 women were asked to monitor their caffeine intake
over the course of one day. The mean amount of caffeine consumed in
the sample of women was 226.553 mg with a standard deviation of
229.462 mg. In the article, researchers would like to include a 99%
confidence interval.
The values below are t critical point corresponding to 90%,
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An article investigated the consumption of caffeine among women. A sample of 43 women were asked...
An article investigated the consumption of caffeine among women.
A sample of 43 women were asked to monitor their caffeine intake
over the course of one day. The mean amount of caffeine consumed in
the sample of women was 243.872 mg with a standard deviation of
209.05 mg. In the article, researchers would like to include a 90%
confidence interval.
The values below are t critical point corresponding to 90%,
95%, 98%, and 99% confidence. Which critical point corresponds...
A researcher was interested in the effects of caffeine on sleep. She measured how many minutes...
A researcher was interested in the effects of caffeine
on sleep. She measured how many minutes it took for ten
participants to fall asleep. Half of the participants drank a liter
of caffeinated soda before going to sleep while the other half were
only allowed to drink water. Summary data of minutes are presented
below. Did the caffeine increase the length of time it took to fall
asleep (a =.05)?
Water
Group Caffeine Group
18 22
15...
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