Description
I have a three short assignments that need to be completed, tomorrow by evening time. I need the checkpoint in by tomorrow, though. The first three-links are the actual assignments. The fourth-link has all the data sets for the second assignment (listed in order.) The last two-links are the data sets for the third-assignment (either data set for this assignment is fine.)
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Explanation & Answer
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Week 4 Checkpoint
PSYCH/625 Version 4
University of Phoenix Material
Week 4 Checkpoint
a). Looking at the sample provided, how would you interpret the results of the two-way
ANOVA?
The result of the ANOVA F-Ratio implies that we reject the Null Hypothesis at significances of
alpha
= 0.05/0.01. Hence in this case there is significant difference between the groups means.
b). What does the p value tell you?
From the F Distribution table the the critical value for F(4, 45)= 9.085, p < 0.05 is 2.58. Given
that the F- score is 9.085 is above the critical score, the null hypothesis should be rejected.
c.) The results mention df. What does that term represent?
df stands fir degree of freedom, is used to gauge the number of independent variables give by the
sample that is used to calculate the deviation of the sum of squares.
d). How is it calculated?
It is calculated as (n-1)
First factor Number of rows – 1
Second factor Number of columns – 1
e). Write a plainly stated sentence that explains what these results tell you about your
groups.
The results explains that there is significan difference between the group means implying the
groups affects th outcome.
ANOVA
SCORES
Between
Groups
Sum of
Squares
df
Mean
Square
F
Sig.
351.520
4
87.880
9.085
.000
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1
Week 4 Checkpoint
PSYCH/625 Version 4
Within
Groups
435.300
45
Total
786.820
49
9.673
Copyright © 2017 by University of Phoenix. All rights reserved.
2
Time to Practice: Week 4
PSYCH/625 Version 4
University of Phoenix Material
Time to Practice: Week 4
Complete Parts A, B, and C below.
Part A
Some questions in Part A require that you access data from Statistics for People Who (Think They) Hate
Statistics. This data is available on the student website under the Textbook Resources link.
1. Using the data in the file named Ch. 11 Data Set 2, test the research hypothesis at the .05 level of
significance that boys raise their hands in class more often than girls. Do this practice problem by
hand using a calculator. What is your conclusion regarding the research hypothesis? Remember to
first decide whether this is a one- or two-tailed test.
Male = 1
Female = 2
Male
Female
9
3
8
5
4
1
9
2
3
6
8
4
10
3
8
6
9
7
8
9
10
7
7
3
6
7
12
6
8
8
This is a one-tail test since it is directional.
Copyright © 2017, 2014 by University of Phoenix. All rights reserved.
1
Time to Practice: Week 4
PSYCH/625 Version 4
The population standard deviation is unknown, the sample standard deviations are known, two means are
being put to the test and the sample size are below 30 hence.
According to the research theory, males raise their hands more than females in a class setting
𝜇1 = 𝑀𝑒𝑎𝑛 𝑜𝑓 ℎ𝑎𝑛𝑑𝑠 𝑟𝑎𝑖𝑠𝑒𝑑 𝑏𝑦 𝑚𝑎𝑙𝑒𝑠
𝜇2 = 𝑀𝑒𝑎𝑛 𝑜𝑓 ℎ𝑎𝑛𝑑𝑠 𝑟𝑎𝑖𝑠𝑒𝑑 𝑏𝑦 𝑓𝑒𝑚𝑎𝑙𝑒𝑠
𝐻𝑜 : 𝜇1 ≤ 𝜇2
𝐻𝑎 : 𝜇1 > 𝜇2
The chosen significance level is 0.05 (alpha ...