Question
In: Math
1) You test a new drug to reduce blood pressure. A group of 15 patients with...
1) You test a new drug to reduce blood pressure. A group of 15 patients with high blood pressure report the following systolic pressures (measured in mm Hg): ̄y s before medication: 187 120 151 143 160 168 181 197 133 128 130 195 130 147 193 157.53 27.409 after medication: 187 118 147 145 158 166 177 196 134 124 133 196 130 146 189 156.40 27.060 change: 0 2 4 -2 2 2 4 1 -1 4 -3 -1 0 1 4 1.133 2.295 a) Calculate a 90% CI for the change in blood pressure. b) Calculate a 99% CI for the change in blood pressure. c) Does either interval (the one you calculated in (a) or (b)) include 0? Why is this important? d) Now conduct a one sample t-test using μ = 0, and α = .10. Are the results consistent with (a)? e) Finally, conduct a one sample t-test using μ = 0, and α = .01. Are the results consistent with (b)? PLEASE TELL HOW TO GET ALPHA I USE .05 AND GOT VALUE 2.145
Solutions
milcah answered 4 months agoRelated Solutions
You test a new drug to reduce blood pressure. A group of 15 patients with high...
You test a new drug to reduce blood pressure. A group of 15
patients with high blood pressure report the following systolic
pressures (measured in mm Hg): before medication: after medication:
change: ̄y s 187 120 151 143 160 168 181 197 133 128 130 195 130
147 193 187 118 147 145 158 166 177 196 134 124 133 196 130 146 189
156.40 0 2 4 -2 2 2 4 1 -1 4 -3 -1 0 1 4...
A researcher has developed a new drug designed to reduce blood pressure. In an experiment, 21...
A researcher has developed a new drug designed to reduce blood
pressure. In an experiment, 21 subjects were assigned randomly to
the treatment group, and received the new experimental drug. The
other 23 subjects were assigned to the control group, and received
a standard, well known treatment. After a suitable period of time,
the reduction in blood pressure for each subject was recorded. A
summary of these data is:
n
x? s
Treatment group (new
drug):
21 23.48
8.01...
A group of five individuals with high blood pressure were given a new drug that was...
A group of five individuals with high blood pressure were given
a new drug that was designed to lower blood pressure. Systolic
blood pressure was measured before and after treatment for each
individual, with the following results:
Subject
Before
After
1
172
145
2
164
132
3
168
129
4
158
135
5
183
145
Let μX represent the population mean before treatment and let μY
represent the population mean after treatment. Find a 90%
confidence interval for the difference...
A company claims that its new drug is effective is lowering blood pressure. To test this...
A company claims that its new drug is effective is lowering
blood pressure. To test this claim, an independent clinic tested
the drug on 6 volunteers. Below are the blood pressures before and
after taking the new drug.
BP Before Drug
142
130
145
129
138
126
BP After Drug
120
110
140
115
125
110
(a) What tailed test is this? (i.e., RIGHT,
LEFT, or TWO-TAILED?)
(b) What is the value of the "Test
Statistic"?
(c) What is...
23. A group of five individuals with high blood pressure were given a new drug that...
23. A group of five individuals with high blood pressure were
given a new drug that was designed to lower blood pressure.
Systolic blood pressure was measured before and after treatment for
each individual. The mean and standard deviation for the before
treatment were 168.6 and 9.3, respectively. The mean and standard
deviation for the after treatment were 137.2 and 7.4, respectively.
The 90% confidence for the mean reduction in systolic blood
pressure is nearly?
A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic blood pressure...
A pharmaceutical company claims that its new drug reduces
systolic blood pressure. The systolic blood pressure (in
millimeters of mercury) for nine patients before taking the new
drug and 2 hours after taking the drug are shown in the table
below. Is there enough evidence to support the company's claim? Let
d = (blood pressure before taking new drug) − (blood pressure after
taking new drug). Use a significance level of α = 0.05 for the
test. Assume that the...
A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic blood pressure...
A pharmaceutical company claims that its new drug reduces
systolic blood pressure. The systolic blood pressure (in
millimeters of mercury) for nine patients before taking the new
drug and 2 hours after taking the drug are shown in the table
below. Using this data, find the 99% confidence interval for the
true difference in blood pressure for each patient after taking the
new drug. Assume that the blood pressures are normally distributed
for the population of patients both before and...
A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic blood pressure...
A pharmaceutical company claims that its new drug reduces
systolic blood pressure. The systolic blood pressure (in
millimeters of mercury) for nine patients before taking the new
drug and 2 hours after taking the drug are shown in the table
below. Using this data, find the 99% confidence interval for the
true difference in blood pressure for each patient after taking the
new drug. Assume that the blood pressures are normally distributed
for the population of patients both before and...
A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic blood pressure...
A pharmaceutical company claims that its new drug reduces
systolic blood pressure. The systolic blood pressure (in
millimeters of mercury) for nine patients before taking the new
drug and 22 hours after taking the drug are shown in the table
below. Is there enough evidence to support the company's claim?
Let d=(blood pressure before taking new drug)−(blood pressure
after taking new drug). Use a significance level of α=0.01 for the
test. Assume that the systolic blood pressure levels are normally...
A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic blood pressure...
A pharmaceutical company claims that its new drug reduces
systolic blood pressure. The systolic blood pressure (in
millimeters of mercury) for nine patients before taking the new
drug and 2 hours after taking the drug are shown in the table
below. Is there enough evidence to support the company's claim?
Let d=(blood pressure before taking new drug)−(blood pressure
after taking new drug). Use a significance level of α=0.01 for the
test. Assume that the systolic blood pressure levels are normally...
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