Question
In: Statistics and Probability
You are a researcher working with hospitalization data which includes the 3 variables of systolic blood...
You are a researcher working with hospitalization data which includes the 3 variables of systolic blood pressure (e.g., 132, 124, 142), country of origin (e.g., United States, Peru, Italy) and socioeconomic status (measured as low, medium and high).
Which measures of central tendency would be appropriate to calculate for the variable of systolic blood pressure?
Solutions
orchestra answered 2 years agoRelated Solutions
A researcher studied age and systolic blood pressure of 6 randomly selected subjects. The data are...
A researcher studied age and systolic blood pressure of 6
randomly selected subjects. The data are shown in the table.
Subject /Age /Pressure
A 43 120
B 48 128
C 56 135
D 61 141
E 67 143
F 70 152
Test the significance of the correlation between age and
systolic blood pressure. Use a significance level of 0.05.
Step1) Identify the null and alternative hypotheses
symbolically. H0: H1:
Step 2) Find the p – value and make the decision...
Researcher recorded the following data to study the effects of age (x) on systolic blood pressure...
Researcher recorded the following data to study the effects of
age (x) on systolic blood pressure (y) in men over the age of 50.
Using the data below, calculate the 95% prediction interval for the
systolic blood pressure of a 60-year old man. Estimated regression
line is Y = 84.250 + 0.991x.
Age
67
54
78
66
80
57
59
71
60
62
53
Systolic BP (mmHg)
135
145
167
129
163
146
152
168
142
151
129
A medical researcher is investigating the effect of drinking coffee on systolic blood pressure. The researcher...
A medical researcher is investigating the effect of drinking
coffee on systolic blood pressure. The researcher assumes the
average systolic blood pressure is 120 mmHg. For a random sample of
200 patients, the researcher takes two measurements of systolic
blood pressure. The first systolic blood pressure measurement is
taken during a week when the patients drink no coffee, and the
second systolic blood pressure measurement is taken during a week
when the patients drink at least two cups of coffee....
A researcher wishes to determine whether the systolic blood pressure of people who follow a vegetarian...
A researcher wishes to determine whether the systolic blood
pressure of people who follow a vegetarian diet is, on average,
lower than the systolic blood pressure of those who do not follow a
vegetarian diet. Independent simple random samples of 85 vegetarian
and 75 nonvegetarians yielded the following sample statistics:
Vegetarians
Nonvegetarians
Mean = 124.1
Mean = 138.7
s1 = 38.7
s2 = 39.2
Use the significance level of 0.01 to test the claim of the
researcher.
Suppose a researcher wants to perform an hypothesis test to decide whether the mean systolic blood...
Suppose a researcher wants to perform an hypothesis test to
decide whether the mean systolic blood pressure for adults aged
20-29 is lower than the mean systolic blood pressure for adults
aged 30-39. State the null and alternative hypothesis for the
hypothesis test. Discuss the basic strategy for performing this
hypothesis test, based on independent samples.
A medical researcher wants to begin a clinical trial that involves systolic blood pressure (SBP) and...
A medical researcher wants to begin a clinical trial that
involves systolic blood pressure (SBP) and cadmium (Cd) levels.
However, before starting the study, the researcher wants to confirm
that higher SPB is associated with lower Cd levels. Below are the
SBP and Cd measurements for a sample a participants. What can the
researcher conclude with an α of 0.10?
SBP
Cd
169
183
115
113
182
126
179
127
148
160
140
55.5
55.7
55.8
55.9
55.5
55.7
55.6...
A medical researcher wants to begin a clinical trial that involves systolic blood pressure (SBP) and...
A medical researcher wants to begin a clinical trial that
involves systolic blood pressure (SBP) and cadmium (Cd) levels.
However, before starting the study, the researcher needs to know if
there is a relationship between SBP and Cd. Below are the SBP and
Cd measurements for a sample a participants. What can the
researcher conclude with α = 0.05?
SBP
Cd
169
161
115
113
182
126
179
127
148
160
140
55.9
55.7
55.7
55.5
55.9
55.8
55.8
55.5...
Blood pressure: A blood pressure measurement consists of two numbers: the systolic pressure, which is the...
Blood pressure: A blood pressure measurement consists of two
numbers: the systolic pressure, which is the maximum pressure taken
when the heart is contracting, and the diastolic pressure, which is
the minimum pressure taken at the beginning of the heartbeat. Blood
pressures were measured, in millimeters of mercury, for a sample of
adults. The following table presents the results.
Systolic '
134
113
119
130
133
107
108
157
Diastolic
87
77
69
76
91
71
69
103
Use the...
Blood pressure: A blood pressure measurement consists of two numbers: the systolic pressure, which is the...
Blood pressure: A blood pressure measurement
consists of two numbers: the systolic pressure, which is the
maximum pressure taken when the heart is contracting, and the
diastolic pressure, which is the minimum pressure taken at the
beginning of the heartbeat. Blood pressures were measured, in
millimeters, for a sample of 7 adults. The following table presents
the results. The least-squares regression line
=y=+b0b1x+24.83840.4499x, =se7.161065, =Σ−xx2407.43, and x=120.71
are known for this data.
Systolic
Diastolic
112
75
118
88
130
76...
The data show the systolic and diastolic blood pressure readings for 12 women.
The data show the systolic and diastolic blood pressure readings for 12 women.
X=Systolic 123 116 82 126 116 138 109 119 155 106 178 84
Y=Diastolic 66 71 62 84 70 91 67 66 80 70 89 72
a….What is the Y-INTERCEPT of the Least-Squares regression equation?
b…..Predict the diastolic reading for a woman whose systolic reading is 165.
c…..What percent of the variation in diastolic pressure is due to factors...
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