Question

In: Statistics and Probability

the serum cholesterol levels in 17 individuals are 232,254,201,196,222,259,186,213,200,252,249,189,230,198,240,203,211 find the 20th and the 75th percentiles...

the serum cholesterol levels in 17 individuals are 232,254,201,196,222,259,186,213,200,252,249,189,230,198,240,203,211 find the 20th and the 75th percentiles for these cholesterol levels.

Solutions

Expert Solution

Solution : Given that 232,254,201,196,222,259,186,213,200,252,249,189,230,198,240,203,211

20th percentile = 198

75th percentile = 240


Related Solutions

30. Total serum cholesterol levels for individuals 65 years of age or older are assumed to...
30. Total serum cholesterol levels for individuals 65 years of age or older are assumed to follow a normal distribution, with a mean of 182 and a standard deviation of 14.7. a. What proportion of individuals 65 years of age and older have cholesterol levels of 175 or more? b. What proportion of individuals 65 years of age and older have cholesterol levels between 150 and 175? c. If the top 10% of the cholesterol levels are assumed to be...
Please show work. Total serum cholesterol levels for individuals 65 years of age and older are...
Please show work. Total serum cholesterol levels for individuals 65 years of age and older are assumed to follow a normal distribution, with a mean of 182 mg/dL and a standard deviation of 14.7 mg/dL. 10) What proportion of these individuals have cholesterol levels of 175 mg/dL or more? 11) What proportion of these individuals have cholesterol levels between 150 mg/dL and 175 mg/dL? 12) If the top 10% of the cholesterol levels are assumed to be abnormally high, what...
Find the 30th and the 75th percentiles of BIN(n=11,p=0.5). (My thought process is to approximate it...
Find the 30th and the 75th percentiles of BIN(n=11,p=0.5). (My thought process is to approximate it to Normal Distribution and approximate the percentile from there, is it the right way or there is a way without approximation?) Please show your workings.
According the National Center for Health Statistics, the distribution of serum cholesterol levels for 20- to...
According the National Center for Health Statistics, the distribution of serum cholesterol levels for 20- to 74-year-old males living in the United States has mean 211 mg/dl, and a standard deviation of 46 mg/dl. a. We are planning to collect a sample of 25 individuals and measure their cholesterol levels. What is the probability that our sample average will be above 230? b. Which numbers are 1.96 standard errors away rom the expected value of the sampling distributions(i.e. 95% of...
The serum cholesterol levels in men aged 18 – 24 are normally distributed with a mean...
The serum cholesterol levels in men aged 18 – 24 are normally distributed with a mean of 178.1 and a standard deviation of 40.7. Units are in mg/100mL. Use R. Paste your commands and output into the answer box. a) If a man aged 18 – 24 is randomly selected, find the probability that his serum cholesterol level is between 170 and 200. b) If a sample of 10 men aged 18 – 24 is randomly selected, find the probability...
Serum cholesterol is an important risk factor for coronary disease. Suppose that serum cholesterol is approximately...
Serum cholesterol is an important risk factor for coronary disease. Suppose that serum cholesterol is approximately normally distributed with mean 221.4 mg/dL and standard deviation of 45.76 mg/dL. Cholesterol levels in the top 16% are classified as high enough to warrant risk for heart disease. What cholesterol level corresponds to this cut-off? z = _____ cholesterol = ________mg/dL Suppose cholesterol levels in the bottom 32% are classified as normal. What cholesterol level corresponds to a normal reading? z = ______...
The data represent measures on a random sample of 25 individuals with high cholesterol levels. The...
The data represent measures on a random sample of 25 individuals with high cholesterol levels. The variables are as follows: Dependent variable Y: Systolic Blood Pressure (SBP) Independent variable X_1: Body Size, measured by Quetelet (QUET) Index = 100(weight/height2) Independent variable X_2: Age 1. For an individual of age 51 and QUET 3.30, obtain by hand calculation the predicted level of SBP (remember they should be mean centered). If that individual’s actual SBP was found to be 130, obtain the...
Calculate the 20th, 40th, and 70th percentiles for the following data set: (Use the methodology shown...
Calculate the 20th, 40th, and 70th percentiles for the following data set: (Use the methodology shown in Section 3.2 of the text to calculate the percentiles. Negative values should be indicated by a minus sign. Do not round intermediate calculations. Round your final answers to 1 decimal place.) −201 −263 −399 −296 −395 −322 −312 20th Percentile    40th Percentile 70th Percentile
17. Cholesterol Levels A family physician wanted to know if age and gender were factors that...
17. Cholesterol Levels A family physician wanted to know if age and gender were factors that explained levels of serum cholesterol (in mg/dL) in her adult patients. She randomly selects two patients for each category of data and obtains the following results: Gender Age (years) 18–34 35–54 55 and older Female 180, 192 205, 226 218, 231 Male 175, 193 213, 222 203, 185 Source: National Center for Health Statistics Serum cholesterols are known to be approximately normally distributed and...
A study is conducted to compare mean cholesterol levels for individuals following a low-carbohydrate diet for...
A study is conducted to compare mean cholesterol levels for individuals following a low-carbohydrate diet for at least 6 months to individuals following a conventional (low-fat, low-calorie) diet for at least 6 months. The data are summarized here: Diet Program Sample Size Mean Cholesterol Standard Deviation Cholesterol Low carbohydrate 50 225.4 24.5 Conventional 75 203.8 21.6 Using the five-step approach to hypothesis testing, test if there is a significant difference in mean cholesterol levels between the diet programs using a...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT