Question
In: Statistics and Probability
In a fictional study, suppose that a psychologist is studying the effect of daily meditation on...
In a fictional study, suppose that a psychologist is studying the effect of daily meditation on resting heart rate. The psychologist believes the patients who not meditate have a higher resting heart rate. For a random sample of 45 pairs of identical twins, the psychologist randomly assigns one twin to one of two treatments. One twin in each pair meditates daily for one week, while the other twin does not meditate. At the end of the week, the psychologist measures the resting heart rate of each twin. Assume the mean resting heart rate is 80 heart beats per minute. The psychologist conducts a T-test for the mean of the differences in resting heart rate of patients who do not meditate minus resting heart rate of patients who do meditate. Which of the following is the correct null and alternative hypothesis for the psychologist’s study? H0: µ = 80; Ha: µ > 80 H0: µ = 0; Ha: µ ≠ 0 H0: µ = 0; Ha: µ > 0
Solutions
orchestra answered 2 years agoRelated Solutions
In a fictional study, suppose that a psychologist is studying the effect of daily meditation on...
In a fictional study, suppose that a psychologist is studying
the effect of daily meditation on resting heart rate. The
psychologist believes the patients who not meditate have a higher
resting heart rate. For a random sample of 45 pairs of identical
twins, the psychologist randomly assigns one twin to one of two
treatments. One twin in each pair meditates daily for one week,
while the other twin does not meditate. At the end of the week, the
psychologist measures...
An educational psychologist has developed a meditation technique to reduce anxiety. The psychologist selected a sample...
An educational psychologist has developed a meditation technique
to reduce anxiety. The psychologist selected a sample of high
anxiety students that are asked to do the meditation at two therapy
sessions a week apart. The participants' anxiety is measured the
week before the first session and at each subsequent session. Below
are the anxiety scores for the participants. What can the
psychologist conclude with an α of 0.01?
before
session 1
session 2
9
6
8
5
8
6
9...
An educational psychologist has developed a meditation technique to reduce anxiety. The psychologist selected a sample...
An educational psychologist has developed a meditation technique
to reduce anxiety. The psychologist selected a sample of high
anxiety students that are asked to do the meditation at two therapy
sessions a week apart. The participants' anxiety is measured the
week before the first session and at each subsequent session. Below
are the anxiety scores for the participants. What can the
psychologist conclude with α = 0.05?
before
session 1
session 2
9
6
8
2
8
6
9
6...
A cognitive psychologist studying motivation wants to determine if type of music has any effect on...
A cognitive psychologist studying motivation wants to determine
if type of music has any effect on the number of days (in 1 month)
participants visit a gym. A total of three gyms are selected that
have different musical formats. 8 gym members are randomly sampled
from each gym, and their gym attendance is monitored for 30 days.
Complete the following ANOVA summary table, and use a significance
level of α=0.10α=0.10.
Source
SS
df
MS
F
P
Between
7.16
3.733
Within...
A cognitive psychologist studying motivation wants to determine if type of music has any effect on...
A cognitive psychologist studying motivation wants to determine
if type of music has any effect on the number of days (in 1 month)
participants visit a gym. A total of three gyms are selected that
have different musical formats. 14 gym members are randomly sampled
from each gym, and their gym attendance is monitored for 30 days.
Complete the following ANOVA summary table, and use a significance
level of α=0.05.
Use the =FDIST(F, dftreatment, dferror) function in Excel to
locate...
Scenario: A psychologist has been studying the effect of deterioration of memory over time. He has...
Scenario: A psychologist has been studying the effect of
deterioration of memory over time. He has been interested in how
memory for particularly startling events, called flashbulb
memories, might differ from memory for everyday events. He asked
college students to try to remember all the circumstances of an
ordinary event (such as meeting a friend) and then immediately
after the event to fill out a survey about the details of the
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In studying the relationship between average daily temperature and time spent on a telephone, suppose you...
In studying the relationship between average daily
temperature and time spent on a telephone, suppose you
computed r=0.607 using n=31 data points. Using
the critical values table below, determine if the value
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a study was done to determine if daily maximal-squat training had a positive effect on a...
a study was done to determine if daily maximal-squat
training had a positive effect on a 3 rep squat max compared to
once per week high-intensity training men in their 20s. Twenty-four
individuals were randomly selected from a large list of competitive
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and each could back-squat more than double their own bodyweight.
The men each performed...
From univariate to bivariate Suppose you are interested in studying the effect of education on wages....
From univariate to bivariate
Suppose you are interested in studying the effect of education
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You propose the following regression of annual salary on years
of education and work experience:
wage=β0 +
β1 educ + β2exper + u
where
wage = annual salary
educ = years of formal education
exper = work experience
u = error term
In a simple regression analysis with educ as the only
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are ....
Suppose that you want to measure the causal effect of hours spent studying on the performance...
Suppose that you want to measure the causal effect of hours
spent studying on the performance on a microeconomics test for a
class of 30 students.
Which of the following could be an ideal randomized controlled
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A.
Allow the fifteen students with the highest grades in the class
an extra day to study for the microeconomics test. Then measure the
test score differences between students who got the extra day to
study and...
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