Question

The systolic blood pressure (given in millimeters) of males has an approximately normal distribution with mean μ = 135 and standard deviation σ = 12.

(a) Calculate the z-scores for the male systolic blood pressures 130 and 140 millimeters. (Round your answers to two decimal places.)

130 mm |
z |
= | |

140 mm |
z |
= |

(b) If a male friend of yours said he thought his systolic blood
pressure was 2.5 standard deviations below the mean, but that he
believed his blood pressure was between 130 and 140 millimeters,
what would you say to him? (Enter your numerical answer to the
nearest whole number.)

He is (correct, incorrect) because 2.5 standard deviations below the mean would give him a blood pressure reading of millimeters, which is ---( below, above) in the range of 130 to 140 millimeters.

Answer #1

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?

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...

Assume that the mean systolic blood pressure of normal adults is
120 millimeters of mercury (mm Hg) and the standard deviation is
5.6. Assume that the variable is normally distributed. If an
individual is selected, find the probability that the individual’s
systolic blood pressure will be between 118.4 and 121.9 mm Hg.

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.

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...

The mean systolic blood pressure of adults is 120 millimeters of
mercury (mm Hg) with a standard deviation of 5.6. Assume the
variable is normally distributed.
1) If an individual is randomly selected, what is the
probability that the individual's systolic pressure will be between
120 and 121.8 mm Hg.
2) If a sample of 30 adults are randomly selected, what is the
probability that the sample mean systolic pressure
will be between 120 and 121.8 mm Hg.
-Central Limit...

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.

When a man’s blood pressure is in control, his systolic blood
pressure reading has a mean of 130. For the last six times he has
monitored his blood pressure, he has obtained the values:
140,150,155,155,160,140
Does this provide evidence that his true mean blood pressure has
changed? Carry out the steps of the significance test and interpret
the p-value in terms of the problem.

For women aged 18 to 24, systolic blood pressure (in mm Hg) is
normally distributed with a mean of 114.8 and a standard deviation
of 13.1 (based on data from the National Health Survey).
Hypertension is commonly defined as a systolic blood pressure above
140. Let X represent the systolic blood pressure of a randomly
selected woman between the ages of 18 and 24. a. Find the
probability the mean systolic blood pressure of four randomly
selected women would fall...

For women aged 18-24, systolic blood pressures (in mm Hg) are
normally distributed with a mean of 114.8 and a standard deviation
of 13.1. Hypertension is commonly defined as a systolic blood
pressure above 140.
a. If a woman between the ages of 18 and 24 is randomly
selected, find the probability that her systolic blood pressure is
greater than 140.
b. If 4 women in that age bracket are randomly selected, find
the probability that their mean systolic blood...

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