Question

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

Answer #1

a) 16.5%

b) 32.2%

Use the table for Area Under the Standard Normal Curve
to answer the question. Note: Round z-scores to the nearest
hundredth and then find the required A values using the table.
The cholesterol levels of a group of young women at a
university are normally distributed, with a mean of 189 and a
standard deviation of 36. What percent of the young women have the
following cholesterol levels? (Round your answers to one decimal
place.)
(a) greater than 225
_________%...

In the exercise, answer the question by rounding z-scores to the
nearest hundredth and then finding the required A values using the
table. The cholesterol levels of a group of young women at a
university are normally distributed, with a mean of 189 and a
standard deviation of 39. What percent of the young women have the
following cholesterol levels? (For each answer, enter a number.
Round your answers to one decimal place.)
(a) greater than 216 %
(b) between...

The total cholesterol levels of a sample of men aged 35-44 are
normally distributed with a mean of 220 milligrams per deciliter
and a standard deviation of 38.3 milligrams per deciliter.
(a) What percent of the men have a total cholesterol level less
than 233 milligrams per deciliter of blood? round to two decimal
places.
(b) If 256 men in the 35-44 age group are randomly selected,
about how many would you expect to have a total cholesterol level
greater...

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?

Too much cholesterol in the blood increases the risk of heart
diseases. Young women are generally less afflicted with high
cholesterol than other groups. The cholesterol levels for women
aged 20 to 34 follow an approximately normal distribution with mean
190 milligrams per deciliter (mg/dl) and standard deviation 41
mg/dl.
(a) Cholesterol levels above 270 mg/dl demand medical attention.
What percent of young women have levels above 270 mg/dl?
(b) Levels above 220 mg/dl are considered borderline high. What
percent...

The total cholesterol levels of a sample of men aged 35-44 are
normally distributed with a mean of 222 milligrams per deciliter
and a standard deviation of 38.1 milligrams per deciliter.
(a) The percent of the men that have a total cholesterol level
less than 228 milligrams per deciliter of blood is what %. (Round
to two decimal places as needed.
(b) of the 245 men selected____would be expected to have a total
cholesterol level greater than 252 milligrams per...

The total cholesterol levels of a sample of men aged 35-44 are
normally distributed with a mean of
200 milligrams per deciliter and a standard deviation of 38.8
milligrams per deciliter.
(a) What percent of the men have a total cholesterol level less
than 236 milligrams per deciliter of blood?
(b) If 247 men in the 35-44 age group are randomly selected,
about how many would you expect to have a total cholesterol level
greater than
255 milligrams per deciliter...

The total cholesterol levels of a sample of men aged 35-44 are
normally distributed with a mean of 204 204 milligrams per
deciliter and a standard deviation of 36.7 36.7 milligrams per
deciliter. (a) What percent of the men have a total cholesterol
level less than 227 227 milligrams per deciliter of blood? (b) If
244 244 men in the 35-44 age group are randomly selected, about
how many would you expect to have a total cholesterol level greater
than...

The total cholesterol levels of a sample of men aged 35-44 are
normally distributed with a mean of 215 milligrams per deciliter
and a standard deviation of 38.8 milligrams per deciliter
(a) What percent of the men have a total cholesterol level less
than 225 milligrams per deciliter of blood?
(b) If 241 men in the 35-44 age group are randomly selected,
about how many would you expect to have a total cholesterol level
greater than 257 milligrams per deciliter...

The total cholesterol levels of a sample of men aged 35-44 are
normally distributed with a mean of 204 milligrams per deciliter
and a standard deviation of 38.1 milligrams per deciliter. (a)
What percent of the men have a total cholesterol level less than
232 milligrams per deciliter of blood? (b) If 248 men in the
35-44 age group are randomly selected, about how many would you
expect to have a total cholesterol level greater than 257
milligrams per deciliter...

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