Question

Total cholesterol levels for women under 30 in Podunk are normally distributed with mean 173 mg/dL and standard deviation 27.2 mg/dL.

a. If a woman is selected at random, find the probability that her total cholesterol is higher than 180 mg/dL.

b. What cholesterol levels make up the top 70% of this distribution?

Answer #1

According to a recent poll cholesterol levels in healthy adults
are normally distributed with a mean of 209 mg/dL and a standard
deviation of 35 mg/dL. A random sample of 42 healthy adults is
selected. Describe the sampling distribution of the sample mean
cholesterol level for the sample of 42 adults.

The cholesterol levels of a group of young women at a university
are normally distributed, with a mean of 180 and a standard
deviation of 38. What percent of the young women have the following
cholesterol levels? (Round your answers to one decimal place.)
(a) greater than 217
(b) between 183 and 220

Assume the mean of 200 mg/dL and a standard deviation of 10
mg/dL of the cholesterol levels of the general public are known
without error. What is the standard deviation of the sampling
distribution for random samples of size n = 7 of people in the
general public?

We want to compare fasting serum cholesterol levels of Filipino
women to that of the other foreign women. Assume the cholesterol
levels in 20- to 39-years old women in other foreign countries is
normally distributed with mean µ = 190 mg/dl. Blood tests are
performed on 100 female Filipinos in this age range rendered a
sample mean cholesterol level of 181.52 mg/dl and standard
deviation of 40 mg/dl. Conduct a test of hypothesis to determine
whether Filipino women have lower...

The serum cholesterol level of U.S. females 20 years old
or older is normally distributed with a mean of 220mg.dL
(milligrams per deciliter) and a standard deviation of 44 mg/dL.
Let X represent serum total cholesterol level for U.S. females 20
years old or older. One outcome of interest is the probability that
a woman has a serum cholesterol level greater than 266mg/dL. If 550
U.S. women 20 yrs old or older are randomly selected, how many of
them would...

According to a recent poll cholesterol levels in healthy adults
are skewed right with a mean of 209 mg/dL and a standard deviation
of 35 mg/dL. A random sample of 42 healthy adults is selected. Find
the probability that the total cholesterol level in the sample of
42 adults will be less than 8400.
a. 0.0475
b. 0.9525
c. 1
d. 0
e. 0.3974

1. The mean cholesterol levels of women age 45-59 in Ghana,
Nigeria, and Seychelles is 5.1 mmol/l and the standard deviation is
1.0 mmol/l. Assume that cholesterol levels are normally distributed
and a random sample of 25 women are selected.
It is possible with rounding for a probability to be
0.0000.
a) Identify the individual, variable, type of variable and the
random variable X in the context of this problem.
The individual is _____
Select an answer:
(a) 25 randomly...

Calcium levels in people are normally distributed with a mean of
9.5mg / (dL) and a standard deviation of 0.4 mg / (dL) .
Individuals with calcium levels in the bottom 10% of the population
are considered to have low calcium levels. Find the calcium level
that is the borderline between low calcium levels and those not
considered low. Carry your intermediate computations to at least
four decimal places. Round your answer to one decimal place.

1. Several baseline studies are conducted on X = “cholesterol
level (mg/dL)” in a certain population of individuals. From the
given information described below for each of these studies, choose
the LETTER of the most appropriate statistical test to be
implemented, from the following list. Note: For each study, there
is only one correct choice of test. However, a given statistical
test can be the correct choice for more than one study. For
example, choice A could be the correct...

Assume that the heights of women are normally distributed with a
mean of 63.6 inches and a standard deviation of 2.5 inches. a) Find
the probability that if an individual woman is randomly selected,
her height will be greater than 64 inches. b) Find the probability
that 16 randomly selected women will have a mean height greater
than 64 inches.

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