Question

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 test should the researcher do?

a. independent two sample t-test

b. one sample t-test

c. matched pairs t-test

d. one sample Z-test

Answer #1

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 this research....

Suppose Diana, an educational researcher at a local university,
wants to test the impact of a new Spanish course that integrates
cultural-immersion teaching techniques with standard teaching
practices. She selects a simple random sample of 62 freshmen and
divides them into 31 pairs, matched on IQ and high school GPA. She
randomly selects one member of each pair to take the new course,
while the other member in the pair takes the traditional course.
Next, Diana records the course grade,...

An educational researcher has designed two different methods for
teaching a statistics course and would like to investigate which is
more effective. He designs an experiment as follows. He will obtain
a group of volunteer statistics students. Volunteers will be
randomly assigned to one of two groups. Group 1 will be taught the
statistics course by Anna Clark using method A and group 2 will be
taught by Bob Beauman using method B. At the end of the semester,
students...

A researcher in the field of educational psychology is
interested in the effects an open classroom has on intellectual
development. In the open classroom things are much less structured
than in a traditional classroom and she believes that this might
affect problem-solving skills. An elementary school in her district
switched to an open classroom format last year, and she is
interested to see how this has impacted on the kids problem-solving
skills.
She obtains a random sample of 49 fourth...

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...

An educational psychologist studies the effect of frequent
testing on retention of class material. In one of the professor's
sections, students are given quizzes each week. The second section
receives only two tests during the semester. At the end of the
semester, both sections receive the same final exam, and the scores
are summarized below.
Frequent Quizzes
Two Exams
n = 15
n = 15
M = 72
M = 68
If the first sample variance is s^2=32 and the...

An educator randomly assigns students to a program in which some
will use new reading activities and others traditional teaching
methods. At the end, both groups take a reading comprehension
exam. Their scores are shown in the back-to-back stem-and-leaf
display. Do these results suggest that the new activities are
better? Test an appropriate hypothesis and state your
conclusion.
(Assume a significance level of α=0.05.)
Compute the t-statistic. t = ___________
(Round to three decimal places as needed.)
Find the P-value....

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....

Do students reduce study time in classes where they achieve a
higher midterm score? In a Journal of Economic Education
article (Winter 2005), Gregory Krohn and Catherine O’Connor studied
student effort and performance in a class over a semester. In an
intermediate macroeconomics course, they found that “students
respond to higher midterm scores by reducing the number of hours
they subsequently allocate to studying for the course.” Suppose
that a random sample of n = 8 students who performed well...

In a sample of 18 students at East High School the following
number of days of absences were recorded for the previous semester:
4, 3, 1, 0, 4, 2, 3, 0, 1, 2, 3, 0, 4, 1, 1, 5, 1, 1. Manually
compute the mean, median, and range of this sample. Show work.
(Round values to one decimal place)
10) The following data represent the bachelor degrees of some
CEO's who work in the NYC area. Degree Number Accounting 19...

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