help please! In 1968 Schachter conducted a research study examining the relation
ID: 2949195 • Letter: H
Question
help please!
In 1968 Schachter conducted a research study examining the relationship between behavior and body weight. The two factors in this study were:
a.The participant’s weight (normal or obese)
b.The participant’s state of hunger (full stomach, empty stomach).
All participants were led to believe that they were taking part in a taste test for several
types of crackers, and they were allowed to eat as many crackers as they wanted.
Schachter made two predictions: (1) He predicted that normal participant’s eating
behavior would be determined by their state of hunger (i.e. people with empty stomachs
would eat more and people with full stomachs would eat less). (2) He predicted that
eating behavior for obese participants would not be related to their state of hunger (i.e.
obese people would eat the same amount, regardless of how hungry they were). Note
that Schachter predicted an interaction: He predicted that the effect of hunger would be
different for the normal participants and the obese participants.
Factor B: Hunger
Factor A: Weight
Empty stomach
Full stomach
Normal
n = 20
M = 22
T = 440
SS = 1540
n = 20
M = 15
T = 300
SS = 1270
TNormal= 740
Obese
n = 20
M = 17
T = 340
SS = 1320
n = 20
M = 18
T = 360
SS = 1260
TObese= 700
TEmpty = 780
TFull = 660
G = 1440
N = 80
?X2 = 31,836
ANOVA Summary Table
Source
df
MS
Fcrit
Fobt
Between treatments
Factor A (weight)
Factor B (fullness)
A X B interaction
3
1
1
1
20.0
180.0
320.0
FA
FB
FAxB
FA(1,76) = 0.28
FB (1,76) = 2.54
FAxB (1,76) = 4.51
Within treatments
76
71.0
Total
79
2.State the independent and dependent variable(s).
3.What is the appropriate test for this study? Justify your answer.
4.State all null hypotheses.
5.Take us through part D of the A-B-C-D format. (Use ? = .05). Be sure to compare Fcritto all three Fobtand draw the appropriate conclusions, including discussion of main effects and interactions. Note that Fobthas been provided.
Factor B: Hunger
Factor A: Weight
Empty stomach
Full stomach
Normal
n = 20
M = 22
T = 440
SS = 1540
n = 20
M = 15
T = 300
SS = 1270
TNormal= 740
Obese
n = 20
M = 17
T = 340
SS = 1320
n = 20
M = 18
T = 360
SS = 1260
TObese= 700
TEmpty = 780
TFull = 660
G = 1440
N = 80
?X2 = 31,836
Explanation / Answer
From given information of Schachter two predictions, We say that
2) State of Hunger is Independent variable and Weight is a dependent variable.
3) For checking dependency between State of Hunnger and Weight we use chi-square test.
But in given chi square table cell frequencies are same (20) for all cell, So here we use Two-way ANOVA test for dependency.
4) Hypothesis:
Null hypothesis : H01 = Both the weight groups have same stress on average of eating crackers.
H02 = Both the Hunger groups have same stress on average of eating crackers.
And
H03 = Two factors are independent or That interaction effect not present.
5)
From table of Two-Way ANOVA. we see the value of Fobt , compaire these value with Fcritical .
Here we see that For Weight and Hunger Fobt < Fcritical . So we accept null hypothesis. That is Both the weight groups and Hunger groups have same stress on average of eating crackers.
And we see that for Interaction Weight*Hunger Fobt > Fcritical . So we reject Null hypothesis. That is two factors are dependent or That interaction effect present.
Factor Fobt Fcritical Comparision Weight 0.28 F1,76 = 3.92 Fobt < Fcritical Hunger 2.54 F1,76 = 3.92 Fobt < Fcritical Weight*Hunger 4.51 F1,76 = 3.92 Fobt > FcriticalRelated Questions
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