Effect of caffeine on IQ
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effectofcaffeineonIQ.docxRunning head: EFFECT OF CAFFEINE ON IQ TABLES 1
EFFECT OF CAFFEINE ON IQ TABLES 2
Table 1 Variables entered/ removed
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Variables Entered/Removeda |
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|
Model |
Variables Entered |
Variables Removed |
Method |
|
1 |
Caffeine Doseb |
. |
Enter |
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a. Dependent Variable: IQ Score |
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b. All requested variables entered. |
Table 2 Model Summary
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Model Summary |
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Model |
R |
R Square |
Adjusted R Square |
Std. Error of the Estimate |
|
1 |
.917a |
.840 |
.831 |
4.461 |
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a. Predictors: (Constant), Caffeine Dose |
Table 3 Analysis of Variance
|
ANOVAa |
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|
Model |
Sum of Squares |
df |
Mean Square |
F |
Sig. |
|
|
1 |
Regression |
1881.519 |
1 |
1881.519 |
94.541 |
.000b |
|
|
Residual |
358.231 |
18 |
19.902 |
|
|
|
|
Total |
2239.750 |
19 |
|
|
|
|
a. Dependent Variable: IQ Score |
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b. Predictors: (Constant), Caffeine Dose |
Table 4 Regression Coefficients
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Coefficientsa |
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|
Model |
Unstandardized Coefficients |
Standardized Coefficients |
T |
Sig. |
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|
|
B |
Std. Error |
Beta |
|
|
|
|
1 |
(Constant) |
91.308 |
2.705 |
|
33.761 |
.000 |
|
|
Caffeine Dose |
.134 |
.014 |
.917 |
9.723 |
.000 |
|
a. Dependent Variable: IQ Score |
Figure 1 Scatterplot Diagram showing the linear relationship between caffeine dose and IQ score
