Question
In: Statistics and Probability
We wonder if caffeine facilitates the learning of nonsense syllables. We randomly assign participants to one...
We wonder if caffeine facilitates the learning of nonsense syllables. We randomly assign participants to one of two groups. People in the experimental group drink 2 cups of coffee and then learn a list of nonsense syllables. People in the control group drink 2 cups of plain water and then learn the same list. We record the number of trials required to perfectly learn the list for each participant. Did participants who drank the coffee learn the list faster than participants who drank the water? Be sure to interpret your answer completely, including a graph if appropriate. t-test for Independent Samples df = N1 + N2 – 2
| Experimental coffee | Control Water |
|---|---|
| 7 | 9 |
| 9 | 12 |
| 7 | 15 |
| 11 | 17 |
| 10 | 14 |
Solutions
orchestra answered 1 year agoRelated Solutions
We wonder if caffeine facilitates the learning of nonsense syllables. We randomly assign participants to one...
We wonder if caffeine facilitates the learning of nonsense
syllables. We randomly assign participants to one of two groups.
People in the experimental group drink 2 cups of coffee and then
learn a list of nonsense syllables. People in the control group
drink 2 cups of plain water and then learn the same list. We record
the number of trials required to perfectly learn the list for each
participant. Did participants who drank the coffee learn the list
faster than...
Suppose a hypertension trial is mounted and 18 participants are randomly assigned to one of the...
Suppose a hypertension trial is mounted and 18 participants are
randomly assigned to one of the comparison treatments. Each
participant takes the assigned medication and their systolic blood
pressure (SBP) is recorded after 6 months on the assigned
treatment. The data are presented in the table below. Compute the
totals for each column (1pt).
Group 1 Standard Treatment : 124 111 133 125 128 115 =
736
Group 2 Placebo: 134 143 148 142 150 160 =
877
Group 3...
Suppose a hypertension trial is mounted and 18 participants are randomly assigned to one of the...
Suppose a hypertension trial is mounted and 18 participants are
randomly assigned to one of the comparison treatments. Each
participant takes the assigned medication and their systolic blood
pressure (SBP) is recorded after 6 months on the assigned
treatment. The data are presented in the table below. Compute the
totals for each column (1pt).
Group 1 Standard Treatment : 124 111 133 125 128 115 =
736
Group 2 Placebo: 134 143 148 142 150 160 =
877
Group 3...
Suppose a hypertension trial is mounted and 18 participants are randomly assigned to one of the...
Suppose a hypertension trial is mounted and 18 participants are
randomly assigned to one of the comparison treatments. Each
participant takes the assigned medication and his or her systolic
blood pressure is recorded after 6 months on the assigned
treatment. The data are as follows.
Standard Treatment
Placebo
New Treatment
124
134
114
111
143
117
133
148
121
125
142
124
128
150
122
115
160
128
Is there a difference in mean systolic blood pressure among
treatments? Run...
Suppose a hypertension trial is mounted and 18 participants are randomly assigned to one of the...
Suppose a hypertension
trial is mounted and 18 participants are randomly assigned to one
of the comparison treatments. Each participant takes the assigned
medication and their systolic blood pressure (SBP) is recorded
after 6 months on the assigned treatment. The data are as
follows.
Standard Treatment
Placebo
New Treatment
123
133
113
110
144
118
134
147
121
126
140
123
127
155
124
116
162
130
Is there a difference
in mean SBP among treatments? Run the appropriate test...
A group of volunteers are randomly divided into two groups. One group of participants takes a...
A group of volunteers are randomly divided into two groups. One
group of participants takes a pill each morning for a year which
contains antioxidants (Vitamins A, C, E, etc), while the other
group takes a placebo pill for the same time period. Following this
they are measured on a problem solving task given under stressful
conditions. The number of errors is counted during solution.
Results were:
GROUP 1 GROUP 2
ANTIOXIDANTS PLACEBO (CONTROL)
N = 14 ...
1) A student randomly and independently samples and assigns 6 participants to one of 4 conditions....
1) A student randomly and independently samples and assigns 6
participants to one of 4 conditions. She gives each group a
treatment she believes will affect performance on the dependent
measure. Higher scores indicate better performance. The ANOVA
summary table is from the data that she has collected. Find
the MSbetween. If needed, please round to two decimal
places.
Source
SS
df
MS
F
Between
87
Within
31
2)
A student randomly and independently samples and assigns 15
participants to...
In a comparison of two different weight-loss programs, obese participants were randomly assigned to one of...
In a comparison of two different weight-loss programs, obese
participants were randomly assigned to one of two groups: (1) the
soy group, a low-calorie group that ate only soy-based proteins, or
(2) the traditional group, a low-calorie group that received 2/3 of
their protein from animal products and 1/3 from plant products. One
of the dependent measures collected was the amount of body fat loss
as a percentage of initial body weight.
Summary data from each group based on this...
In a comparison of two different weight-loss programs, obese participants were randomly assigned to one of...
In a comparison of two different weight-loss programs, obese
participants were randomly assigned to one of two groups: (1) the
soy group, a low-calorie group that ate only soy-based proteins, or
(2) the traditional group, a low-calorie group that received 2/3 of
their protein from animal products and 1/3 from plant products. One
of the dependent measures collected was the amount of body fat loss
as a percentage of initial body weight.
Summary data from each group based on this...
What is Statistical Significance? Date 01/29/2019 What is statistical significance? If we randomly assign subjects to...
What is Statistical Significance? Date 01/29/2019
What is statistical significance? If we randomly assign
subjects to two groups we would expect there to be some difference
in the groups just by chance. If a difference is statistically
significant then it is large enough that we would not expect it to
happen just by chance. When we compare the results of an
experiment, if there is a statistically significant difference then
we can conclude that there is a cause-effect relationship between...
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