2. (50pts) Now, you must determine if a new cholesterol drug is effective. You k
ID: 3073858 • Letter: 2
Question
2. (50pts) Now, you must determine if a new cholesterol drug is effective. You know that the drug lowers blood pressure (hint: pick correct alternate hypothesis) but are not sure if the difference is significant. With 95% confidence, is there a statistically significant difference in blood pressure (mmHg) before and after administration of the drug?
Patient #
BP before drug (mm Hg)
BP after drug (mm HG)
1
154
123
2
162
143
3
178
132
4
184
165
5
160
143
6
192
165
Patient #
BP before drug (mm Hg)
BP after drug (mm HG)
1
154
123
2
162
143
3
178
132
4
184
165
5
160
143
6
192
165
Explanation / Answer
x1bar - x2bar = 26.50
s(dbar) = 10.9864
SE = s(dbar)/sqrt(n) = 4.4852
CI = 95%
DF = 5
t-value = 2.5706
ME = t*SE = 2.5706*4.4852 = 11.5295
Confidence Interval (x1bar - x2bar) +/- ME
Lower bound = 14.97053
Upper bound = 38.02947
Confidence Interval (14.9705 , 38.0295 )
As 0 does not lie in the above calculated, we reject the null hypothesis
there is a statistically significant difference in blood pressure (mmHg) before and after administration of the drug
Before after dbar 154 123 31 162 143 19 178 132 46 184 165 19 160 143 17 192 165 27Related Questions
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