An educational researcher wanted to know if in-class
activities significantly improved students’ learning compared to
traditional...
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?
Researchers wanted to know whether there was a difference in
comprehension among students learning a computer program based on
the style of the text. They randomly divided 36 students of similar
educational level, age, and so on, into two groups of 18 each.
Group 1 individuals learned the software using a visual manual
(multimodal instruction), while Group 2 individuals learned the
software using a textual manual (unimodal instruction). The
following data represent scores that the students received on an
exam...
A psychologist wanted to know if students in her class were more
likely to cheat if they were low achievers. She divided her 60
students into three groups (low, middle, and high) based on their
mean course-testings score on the previous three tests. She then
asked them to rate how likely they were to cheat on an
course-testings if the opportunity presented itself with very
limited chance for consequences. The students rated their desire to
cheat on a scale ranging...
A psychologist wanted to know if students in her class were more
likely to cheat if they were low achievers. She divided her 60
students into three groups (low, middle, and high) based on their
mean course-testings score on the previous three tests. She then
asked them to rate how likely they were to cheat on a
course-testings if the opportunity presented itself with very
limited chance for consequences. The students rated their desire to
cheat on a scale ranging...
A psychologist wanted to know if students in her class were more
likely to cheat if they were low achievers. She divided her 60
students into three groups (low, middle, and high) based on their
mean course-testings score on the previous three tests. She then
asked them to rate how likely they were to cheat on a
course-testings if the opportunity presented itself with very
limited chance for consequences. The students rated their desire to
cheat on a scale ranging...
A psychologist wanted to know if students in her class were more
likely to cheat if they were low achievers. She divided her 60
students into three groups (low, middle, and high) based on their
mean course score on the previous three course-testings. She then
asked them to rate how likely they were to cheat on an
course-testings if the opportunity presented itself with very
limited chance for consequences. The students rated their desire to
cheat on a scale ranging...
A psychologist wanted to know if students in her class were more
likely to cheat if they were low achievers. She divided her 60
students into three groups (low, middle, and high) based on their
mean course-testings score on the previous three tests. She then
asked them to rate how likely they were to cheat on a
course-testings if the opportunity presented itself with very
limited chance for consequences. The students rated their desire to
cheat on a scale ranging...
If a researcher wanted to test whether attending class
influences how students perform on an exam, he collected needed
data and decided that the alpha level is 0.05, so the critical
value is 3.841 (4 mark)
Pass
Fail
Total
attended
25
6
31
skipped
8
15
23
Total
33
21
54
The researcher calculated the
expected frequency for each cell and came up with these numbers in
parenthesis
Pass
Fail
Total
attended
25 (18.94)
6 (12.05)
31
skipped
8 (14.05)...
Edward wanted to know whether students’ attitudes towards the
extra-curricular activities sponsored by EKU differed as a function
of class year and gender. So Edward randomly surveyed 12 freshman,
12 sophomores, 12 juniors, and 12 seniors, with each class year
sample having equal numbers of male and female participants. Each
student was asked to rate their attitude of EKU’s extra-curricular
activities on a 1 – 10 scale with 1 being totally negative and 10
being totally positive.
This is a...
A researcher wanted to know if there is an age difference in the
amount of time spent on social media. They collected data from 8
teenagers (13-18 years old) and 8 young adults (21-26 years old);
they measured the average number of hours spent using all social
media platforms over the course of a day. The mean hours spent on
social media for teenage participants was 2.9750 with a variance of
1.0630 and the mean hours spent on social media...
An educational researcher wishes to know if there is a
difference in academic performance for college freshmen that live
on campus and those that commute. Data was collected from 214214
students. Can we conclude that freshman housing location and
academic performance are related?
Location
Average
Below Average
Above Average
Total
On campus
7777
4242
3939
158158
Off campus
2828
1414
1414
5656
Total
105105
5656
5353
214214
Copy Data
Step 1 of 8 :
State the null and alternative hypothesis....