Cholesterol levels for a group of women aged 30-39 follow an approximately normal distribution with mean...

Cholesterol levels for a group of women aged 30-39 follow an approximately normal distribution with mean 190.14 milligrams per deciliter (mg/dl). Medical guidelines state that women with cholesterol levels above 240 mg/dl are considered to have high cholesterol and about 9.3% of women fall into this category.

1. What is the Z-score that corresponds to the top 9.3% (or the 90.7-th percentile) of the standard normal distribution? Round your answer to three decimal places.

2. Find the standard deviation of the distribution in the situation stated above. Round your answer to 1 decimal place.

Expert Solution

TOPIC:Normal distribution.

(Rounded to one decimal place)(ANSWER).

milcah answered 1 year ago

Cholesterol levels for a group of women aged 50-59 follow an approximately normal distribution with mean...

Cholesterol levels for a group of women aged 50-59 follow an approximately normal distribution with mean 216.57 milligrams per deciliter (mg/dl). Medical guidelines state that women with cholesterol levels above 240 mg/dl are considered to have high cholesterol and about 29.6% of women fall into this category. 1. What is the Z-score that corresponds to the top 29.6% (or the 70.4-th percentile) of the standard normal distribution? Round your answer to three decimal places. 2. Find the standard deviation of...

The distribution of cholesterol levels in a boy is approximately normal with a mean of 170...

The distribution of cholesterol levels in a boy is approximately normal with a mean of 170 and a standard deviation of 30. Levels above 200 require attention. What is the probability of a boy with a cholesterol between 160 and 205?

The cholesterol levels of women aged 21-40 in Canada are approximately Normally distributed with a mean...

The cholesterol levels of women aged 21-40 in Canada are approximately Normally distributed with a mean of 190 miligrams per decilitre (mg/dl). In July of 2007, a clinical assessment applied in Toronto to random sample of twenty–nine Asian female immigrants aged 21-40 had a mean level of 179.52 mg/dl and a standard deviation of 38 mg/dl. (a) At the 10% level of significance test whether the mean cholesterol level of Asian women is the same as the national average. (b)...

The heights of women follow an approximately normal distribution with a mean of 65 inches and...

The heights of women follow an approximately normal distribution with a mean of 65 inches and a standard deviation of 3.5 inches. Use this information and a z-table to answer the following questions. A. Bianca is 60 inches tall. Find the z-score for Bianca's height. Round your z-score to 2 decimal places. B. Find the proportion of the population Bianca is taller than. Round your proportion to 4 decimal places. C. What proportion of women are between 61.5 inches and...

The cholesterol level in children aged 10-15 is assumed to follow a normal distribution with a...

The cholesterol level in children aged 10-15 is assumed to follow a normal distribution with a mean of 175 and a standard deviation of 20. What is the probability of selecting a child at 10-15 years with cholesterol level higher than 190? What is the probability of selecting a child at 10-15 years with cholesterol level between 165 and 190? What is the interval of cholesterol level of a child 10-15 years higher than 75% and lower than top 10%...

2. Assume the cholesterol levels of adult American women can be described by a Normal distribution...

2. Assume the cholesterol levels of adult American women can be described by a Normal distribution with a mean of 196 mg/dL and a standard deviation of 27 mg/dL. a) What percent of adult women do you expect to have cholesterol levels over 200 mg/dL b) Whatpercentofadultwomendoyouexpecttohavecholesterollevelsbetween170and200 mg/dL? c) Above what value are the highest 15% of women’s cholesterol levels? d) What cholesterol level represents the 98th percentile?

the height in children aged 10-15 is assumed to follow a normal distribution with a mean...

the height in children aged 10-15 is assumed to follow a normal distribution with a mean of 165 with a standard deviation of 15. c)what proportion of children 10-15 years of age have height less than 145? d)what proportion of children 10-15 years of age have height between 125 and 210? e)how tall does a child 10-15 years of age have to be shorter than 95% of children? f)how tall does a child 10-15 years of age have to be...

Suppose the heights of adult women follow a normal distribution with a mean of 65.5 inches...

Suppose the heights of adult women follow a normal distribution with a mean of 65.5 inches and a standard deviation of 2.75 inches. Determine the following: 1.) What percent of adult women are taller than 6 feet (72 inches)? 2.) What percent of adult women are taller than 5 feet (60 inches)? 3.) What percent of adult women are between 60 and 72 inches tall? 4.) Because of the high cost of materials, the company has decided that they cannot...

The heights of women aged 20 to 29 in the United States are approximately Normal with...

The heights of women aged 20 to 29 in the United States are approximately Normal with mean 65.1 inches and standard deviation 2.7 inches. Men the same age have mean height 70.2 inches with standard deviation 2.9 inches. NOTE: The numerical values in this problem have been modified for testing purposes. What are the z-scores (±0.01) for a woman 6 feet tall and a man 6 feet tall? A woman 6 feet tall has standardized score A man 6 feet...

Suppose that cholesterol levels for women in the U.S. have a mean of 188 and a...

Suppose that cholesterol levels for women in the U.S. have a mean of 188 and a standard deviation of 24. A random sample of 20 women in the U.S. is selected. Assume that the distribution of this data is normally distributed. Are you more likely to randomly select one woman with a cholesterol level of more than 200 or are you more likely to select a random sample of 20 women with a mean cholesterol level of more than 200?...

Question