Question

R Studio Suppose systolic blood pressure of adults has a normal distribution with mean 130 and standard deviation 35. Research question: Do statistics teachers have a higher average systolic blood pressure than 130? A random sample of 100 statistics teachers is obtained and the mean is 135. (The population standard deviation is known, so we use Z for critical values.)

Solve the using the Confidence Interval Hypothesis Test approach and t.test() Approach. Use the Pima.tr data set to evaluate the hypothesis that the population mean of diastolic blood pressure for Pima Indian women is not 70. library(MASS) data("Pima.tr") #str(Pima.tr) ?Pima.tr

Answer #1

The systolic blood pressure X of adults in a region is normally
distributed with mean 112 mm Hg and standard deviation 15 mm
Hg.
A person is considered “prehypertensive” if his systolic blood
pressure is between 120 and 130 mm Hg.
Find the probability that the blood pressure of a randomly
selected person is prehypertensive.

Assume that the mean systolic blood pressure of normal adults is
120 millimeters of mercury (mm Hg) and the population standard
deviation is 5.6. Assume the variable is normally distributed. If a
sample of 30 adults is randomly selected, find the probability that
the sample mean will be between 120-mm and 121.8-mm Hg.

a. The systolic blood pressure (given in millimeters) of females
has an approximately normal distribution with mean μ = 122
millimeters and standard deviation σ = 16 millimeters. Systolic
blood pressure for females follows a normal distribution. Calculate
the z-scores for a female systolic blood pressure of 136
millimeters (Round answer to 3 decimal places).
b. The systolic blood pressure (given in millimeters) of females
has an approximately normal distribution with mean μ = 122
millimeters and standard deviation σ...

A study is run to estimate the mean Systolic Blood Pressure
level in adults 60 to 80 years of age. A sample of 10 participants
is selected and their Systolic Blood Pressure levels are measured
as follows.
125 135 160 146 135 140 154 170 110 140
Compute Quartiles 1 and 3
Q1=135 and Q2= 152
Q1=152 and Q2=135
Q1=125 and Q2=160
a and b

The systolic blood pressure of adults in the USA is nearly
normally distributed with a mean of 121 millimeters of mercury
(mmHg) and standard deviation of 17.
Someone qualifies as having Stage 2 high blood pressure if their
systolic blood pressure is 160 or higher. Stage 1 high BP is
specified as systolic BP between 140 and 160.
Give your answers rounded to 4 decimal places.
a. What is the probability that an adult in the USA has stage 2...

The systolic blood pressure (given in millimeters) of males has
an approximately normal distribution with mean 123 and standard
deviation 12. Systolic blood pressure for males follows a normal
distribution. The bottom 7% of men have systolic blood pressures
below what value?

The systolic blood pressure of adults in the USA is nearly
normally distributed with a mean of 122 and a standard deviation of
19.
Someone qualifies as having Stage 2 high blood pressure if their
systolic blood pressure is 160 or higher.
(a) Around what percentage of adults in the USA have stage 2
high blood pressure? Give your answer rounded to two decimal
places.
____%
(b) Stage 1 high BP is specified as systolic BP between 140 and
160....

The systolic blood pressure of adults in the USA is nearly
normally distributed with a mean of 119 and standard deviation of
26 . Someone qualifies as having Stage 2 high blood pressure if
their systolic blood pressure is 160 or higher. (a) Around what
percentage of adults in the USA have stage 2 high blood pressure?
Give your answer rounded to two decimal places. % (b) Stage 1 high
BP is specified as systolic BP between 140 and 160....

The systolic blood pressure of adults in the USA is nearly
normally distributed with a mean of 121 and standard deviation of
25 . Someone qualies as having Stage 2 high blood pressure if their
systolic blood pressure is 160 or higher. (a) Around what
percentage of adults in the USA have stage 2 high blood pressure?
Give your answer rounded to two decimal places. % (b) Stage 1 high
BP is specied as systolic BP between 140 and 160....

The mean systolic blood pressure for a population of
patients (µ) from a local clinic is 130 with a standard deviation
(?) of 18.
What systolic blood pressure marks the top 30%
of highest reported levels in the population of patients?
Rounded to the nearest tenth.
134.5
139.4
93.4
0.2
145.9

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