Measurement of systolic blood pressure from nine patients with a certain condition and 11 healthy volunteers of similar age and gender were taken and recorded. Carryout hypothesis testing to determine if the mean pressures in the 2groups differ significantly. Data is in the table 1 below Table 1: Systolic blood pressure from nine patients with a certain condition and 11 healthy volunteers of similar age and gender Patients X1 132 160 145 132 140 154 136 134 134 - - Controls X2 107 98 125 129 128 114 115 126 123 123 128
Measurement of systolic blood pressure from nine patients with a certain condition and 11 healthy volunteers of similar age and gender were taken and recorded.
Carryout hypothesis testing to determine if the mean pressures in the 2groups differ significantly. Data is in the table 1 below
Table 1: Systolic blood pressure from nine patients with a certain condition and 11 healthy volunteers of similar age and gender
|
Patients |
X1 |
132 |
160 |
145 |
132 |
140 |
154 |
136 |
134 |
134 |
- |
- |
|
Controls |
X2 |
107 |
98 |
125 |
129 |
128 |
114 |
115 |
126 |
123 |
123 |
128 |
Df = (n1+n2-2)
Calculated t= (Mean difference)/ [Standard Error Mean difference]
Standard Error Mean difference = Sp {(1/n1+1/n2)}0.5
Sp2 = [(n1 -1) S12 + (n2-1) S22]/Df
Critical value for the t-distribution = 2.010
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