Statistical Methods for Psychology (PSYC 2001) Final Exam Part 3 || || || || || || || || || ||
questions with verified detailed answers || || || ||
The next three questions use the same scenario. The question appears in bold below.
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Scenario: A school psychologist believes that students' social development would improve if they
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were given more time to play. He tests this hypothesis by randomly assigning all incoming 3rd
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graders to one of three conditions. Group 1 (n = 10) sticks to the current schedule of 30 minutes of
|| || || || || || || || || || || || || || || || || || ||
recess every other day. Group 2 (n = 10) gets 30 minutes of recess daily. Group 3 (n = 10) gets 1
|| || || || || || || || || || || || || || || || || || || || || || ||
hour of recess daily. At the end of the year, he measures their social skills on a scale of 0
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(deficient) to 10 (excellent). || || ||
Assuming the psychologist analyzes his data with an ANOVA, what form does the null hypothesis
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take?
||
a) H0: m1 ≠ m2 ≠ m3
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b) H0: m1 = m2 = m3
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c) H0: m = 0
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d) H0: m1 < m2 < m3 - ✔✔b) H0: m1 = m2 = m3
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This question uses the same scenario as the last question. The question appears in bold below.
|| || || || || || || || || || || || || || ||
Scenario: A school psychologist believes that students' social development would improve if they
|| || || || || || || || || || || || ||
were given more time to play. He tests this hypothesis by randomly assigning all incoming 3rd
|| || || || || || || || || || || || || || || ||
graders to one of three conditions. Group 1 (n = 10) sticks to the current schedule of 30 minutes of
|| || || || || || || || || || || || || || || || || || ||
recess every other day. Group 2 (n = 10) gets 30 minutes of recess daily. Group 3 (n = 10) gets 1
|| || || || || || || || || || || || || || || || || || || || || || ||
hour of recess daily. At the end of the year, he measures their social skills on a scale of 0
|| || || || || || || || || || || || || || || || || || || ||
(deficient) to 10 (excellent). || || ||
Using α = .05, what is the critical value for the F statistic?
|| || || || || || || || || || || ||
a) 3.35
||
, b) 2.92
||
c) 1.96
||
d) 1.00 - ✔✔a) 3.35
|| || || ||
This question uses the same scenario as the last question. The question appears in bold below.
|| || || || || || || || || || || || || || ||
Scenario: A school psychologist believes that students' social development would improve if they
|| || || || || || || || || || || || ||
were given more time to play. He tests this hypothesis by randomly assigning all incoming 3rd
|| || || || || || || || || || || || || || || ||
graders to one of three conditions. Group 1 (n = 10) sticks to the current schedule of 30 minutes of
|| || || || || || || || || || || || || || || || || || ||
recess every other day. Group 2 (n = 10) gets 30 minutes of recess daily. Group 3 (n = 10) gets 1
|| || || || || || || || || || || || || || || || || || || || || || ||
hour of recess daily. At the end of the year, he measures their social skills on a scale of 0
|| || || || || || || || || || || || || || || || || || || ||
(deficient) to 10 (excellent). || || ||
Assume the psychologist's null hypothesis is rejected. Which of the following would he calculate
|| || || || || || || || || || || || || ||
in order to know more specifically which of the conditions differ from one another in social
|| || || || || || || || || || || || || || || ||
skills?
a) F ||
b) MSbetween subjects
|| ||
c) Tukey's HSD
|| ||
d) η2 - ✔✔c) Tukey's HSD
|| || || || ||
*Refer to #4 on exam 3* || || || || ||
For the data above, what is SStotal?
|| || || || || ||
a) 18||
b) 10 ||
c) 6 ||
d) 28 - ✔✔d) 28
|| || || ||
questions with verified detailed answers || || || ||
The next three questions use the same scenario. The question appears in bold below.
|| || || || || || || || || || || || ||
Scenario: A school psychologist believes that students' social development would improve if they
|| || || || || || || || || || || || ||
were given more time to play. He tests this hypothesis by randomly assigning all incoming 3rd
|| || || || || || || || || || || || || || || ||
graders to one of three conditions. Group 1 (n = 10) sticks to the current schedule of 30 minutes of
|| || || || || || || || || || || || || || || || || || ||
recess every other day. Group 2 (n = 10) gets 30 minutes of recess daily. Group 3 (n = 10) gets 1
|| || || || || || || || || || || || || || || || || || || || || || ||
hour of recess daily. At the end of the year, he measures their social skills on a scale of 0
|| || || || || || || || || || || || || || || || || || || ||
(deficient) to 10 (excellent). || || ||
Assuming the psychologist analyzes his data with an ANOVA, what form does the null hypothesis
|| || || || || || || || || || || || || ||
take?
||
a) H0: m1 ≠ m2 ≠ m3
|| || || || || ||
b) H0: m1 = m2 = m3
|| || || || || ||
c) H0: m = 0
|| || || ||
d) H0: m1 < m2 < m3 - ✔✔b) H0: m1 = m2 = m3
|| || || || || || || || || || || || || ||
This question uses the same scenario as the last question. The question appears in bold below.
|| || || || || || || || || || || || || || ||
Scenario: A school psychologist believes that students' social development would improve if they
|| || || || || || || || || || || || ||
were given more time to play. He tests this hypothesis by randomly assigning all incoming 3rd
|| || || || || || || || || || || || || || || ||
graders to one of three conditions. Group 1 (n = 10) sticks to the current schedule of 30 minutes of
|| || || || || || || || || || || || || || || || || || ||
recess every other day. Group 2 (n = 10) gets 30 minutes of recess daily. Group 3 (n = 10) gets 1
|| || || || || || || || || || || || || || || || || || || || || || ||
hour of recess daily. At the end of the year, he measures their social skills on a scale of 0
|| || || || || || || || || || || || || || || || || || || ||
(deficient) to 10 (excellent). || || ||
Using α = .05, what is the critical value for the F statistic?
|| || || || || || || || || || || ||
a) 3.35
||
, b) 2.92
||
c) 1.96
||
d) 1.00 - ✔✔a) 3.35
|| || || ||
This question uses the same scenario as the last question. The question appears in bold below.
|| || || || || || || || || || || || || || ||
Scenario: A school psychologist believes that students' social development would improve if they
|| || || || || || || || || || || || ||
were given more time to play. He tests this hypothesis by randomly assigning all incoming 3rd
|| || || || || || || || || || || || || || || ||
graders to one of three conditions. Group 1 (n = 10) sticks to the current schedule of 30 minutes of
|| || || || || || || || || || || || || || || || || || ||
recess every other day. Group 2 (n = 10) gets 30 minutes of recess daily. Group 3 (n = 10) gets 1
|| || || || || || || || || || || || || || || || || || || || || || ||
hour of recess daily. At the end of the year, he measures their social skills on a scale of 0
|| || || || || || || || || || || || || || || || || || || ||
(deficient) to 10 (excellent). || || ||
Assume the psychologist's null hypothesis is rejected. Which of the following would he calculate
|| || || || || || || || || || || || || ||
in order to know more specifically which of the conditions differ from one another in social
|| || || || || || || || || || || || || || || ||
skills?
a) F ||
b) MSbetween subjects
|| ||
c) Tukey's HSD
|| ||
d) η2 - ✔✔c) Tukey's HSD
|| || || || ||
*Refer to #4 on exam 3* || || || || ||
For the data above, what is SStotal?
|| || || || || ||
a) 18||
b) 10 ||
c) 6 ||
d) 28 - ✔✔d) 28
|| || || ||
