Question

(4) A clinical psychologist investigated whether daily
meditation caused an improvement in academic achievement. Some
college students were matched on their GPAs; from each matched
pair, the students were randomly assigned to the Meditation Group
or the No Meditation Group. At the end of the semester, the
students' academic achievement was measured. What statistical test
would be appropriate to test the claim that meditation caused an
improvement in academic performance? **Why?**

Answer #1

To determine whether living in an off-campus residence affects
an undergraduate student’s academic achievement at Longwood
University, samples of 50 on-campus residents and 50 off-campus
residents were drawn randomly and independently from the Longwood
undergraduate student body. The GPA for the on-campus residents had
mean 2.81 and variance 0.32, while the GPA for the off-campus
students had a mean of 2.72 and variance 0.45. In this problem, you
will conduct a two-sample z-test to determine if the data indicates
that...

To determine whether living in an oﬀ-campus residence aﬀects an
undergraduate student’s academic achievement at Longwood
University, samples of 50 on-campus residents and 50 oﬀ-campus
residents were drawn randomly and independently from the Longwood
undergraduate student body. The GPA for the on-campus residents had
mean 2.81 and variance 0.32, while the GPA for the oﬀ-campus
students had a mean of 2.72 and variance 0.45. In this problem, you
will conduct a two-sample z-test to determine if the data indicates
that...

An educational researcher wanted to know if in-class activities
significantly improved students’ learning compared to traditional
lecture only teaching methods. Ten students matched on GPA, Year in
school, and academic major were randomly selected from the current
student population. One student from each pair was randomly
assigned to either the Lecture Only class or Lecture plus Group
Activities class. At the end of the semester, students’ final exam
scores were recorded and teaching methods were compared.
Which type of statistical...

Question 7
An educational psychologist studies the effect of frequent
testing on retention of class material. The students are randomly
assigned to one of two sections of an introductory course. In one
section of an introductory course, students are given quizzes each
week. A second section of the same course receives only two tests
during the semester. At the end of the semester, both sections
receive the same final exam. Please choose the statistical test
that is most appropriate for...

Subject bias can occur in an experiment when the participants
are aware of the purpose of the study and respond in a way that
they think the researchers want. For example, if participants
believe they are in a study to test if coffee improves your mood,
those who drank coffee might claim to be happier than they really
are.
Based on the information given, which of the following
experiments is most likely to have the issue of a control or...

What Statistical Test Should I Use
Please indicate the type of test needed to analyze the data
described.
Hints: Think about the IV and DV. How many levels of
the IV? Are they repeated measures? Are the data
categorical?
A. z-test
B. One-Sample t-Test
C. Dependent Measures t-Test
D. Independent Measures t-Test
E. One-way ANOVA
E. One-way ANOVA
F. Post-hoc tests
G. Between-Subjects Factorial ANOVA
H. Chi-Square test of Independence
________ 1. Compare spatial task scores after 0 or 3 drinks....

7.
(07.02 MC)
Oscar, a yoga instructor at Yoga for You, is interested in
comparing levels of physical fitness of students attending a nearby
high school and those attending a local community college. He
selects a random sample of 210 students from the high school. The
mean and standard deviation of their fitness scores are 82 and 14,
respectively. He also selects a random sample of 210 students from
the local community college. The mean and standard deviation of
their...

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