JMP Analysis of Blood Pressure Data
Enter the data into two columns:
Group – Data Type is Character, Modeling Type is Nominal
Systolic (mmHg) – Data Type is Numeric, Modeling Type is Continuous
Systolic (mmHg)
Go to Analyze
Click on Fit Y by X
Enter Systolic (mmHg) for the Y, Response and Group for the X, Factor
Click on OK
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Click on the Red Triangle next to Oneway Analysis of Systolic (mmHg) By Group
Means/ANOVA/Pooled t – Performs and ANalysis Of VAriance and two-sample t-test
assuming equal variances. (STAT 401)
Systolic (mmHg)
Oneway Analysis of Systolic (mmHg) By Group
Oneway Anova: Summary of Fit
Rsquare
Adj Rsquare
Root Mean Square Error
Mean of Response
Observations (or Sum Wgts)
0.478163
0.449172
10.95673
153.05
20
Analysis of Variance
Source
DF Sum of Squares
Group
1
1980.0500
Error
18
2160.9000
C. Total
19
4140.9500
Means for Oneway Anova
Level
Number
200 mmol/day
10
50 mmol/day
10
Mean Square
1980.05
120.05
Mean
163.000
143.100
Std Error
3.4648
3.4648
F Ratio
16.4935
Lower 95%
155.72
135.82
Prob > F
0.0007*
Upper 95%
170.28
150.38
Std Error uses a pooled estimate of error variance
This is the same procedure used for the two-sample t-test assuming equal variances. The
output from the analysis of variance is displayed above. The value of the F-test statistic
is 16.4935 (this is the value of the t-test statistic squared) with a two-sided P-value of
0.0007.
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