Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.

Get a Professional Answer

Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.

100% Satisfaction Guarantee

Rate the answer you receive.

Ask Ryan Your Own Question

Ryan, Engineer

Category: Calculus and Above

Satisfied Customers: 8740

Experience: B.S. in Civil Engineering

40260889

Type Your Calculus and Above Question Here...

Ryan is online now

1. Glucose levels in patients free of diabetes are assumed

Resolved Question:

1. Glucose levels in patients free of diabetes are assumed to follow a normal distribution with a mean of 120 and a standard deviation of 16. a) What proportion of patients have glucose levels exceeding 115? b) If a patient has a glucose level of 140, what percentile is this? c) What is the probability that the mean glucose level exceeds 115 in a sample of 12 patients? 2. The following are body mass index (BMI) scores measured in 12 patients who are free of diabetes and participating in a study of risk factors for obesity. Body mass index is measured as the ratio of weight in kilograms to height in meters squared. 25 27 31 33 26 28 38 41 24 32 35 40 a) Compute the mean BMI b) Compute the standard deviation of BMI c) Compute the median BMI d) Compute Q1 and Q3 e) Are there outliers in the distribution of BMI (justify your answer)? 3. The following table shows the numbers of patients classified as underweight, normal weight, overweight and obese according to their diabetes status. Underweight Normal Weight Overweight Obese Diabetes 8 34 65 43 No Diabetes 12 85 93 40 If a patient is selected at random, a) What is the probability that they are overweight? b) What is the probability that they are obese and diabetic? c) What proportion of the diabetics are obese? d) What proportion of normal weight patients are not diabetic? e) What proportion of patients are normal weight or underweight? 4. Approximately 30% of obese patients develop diabetes. If a physician sees 10 patients who are obese, a) What is the probability that half of them will develop diabetes? b) What is the probability that none will develop diabetes? c) How many would you expect to develop diabetes?

Thank you for your questions. I'll be happy to help you with these. I'll get started on them immediately and will have the solutions posted for you as soon as possible.

It will probably take 45 minutes or so to get it all typed up, maybe a little longer. You should receive an email notification when the answers are posted.

Are you required to submit this as an Excel document?

The reason I ask is that using Excel will do absolutely nothing to enhance this in any way. In fact, it will actually make it harder to read and understand.

I also have these additional questions. I can add another a payment.

Or do I need to resubmit another ask question?

A new non-invasive screening test is proposed that is claimed to be able to identify patients with impaired glucose tolerance based on a battery of questions related to health behaviors. The new test is given to 75 patients. Based on each patient’s responses to the questions they are classified as positive or negative for impaired glucose tolerance. Each patient also submits a blood sample and their glucose tolerance status is determined. The results are tabulated below. Screening Test Impaired Glucose Tolerance Not Impaired Positive 17 13 Negative 8 37 a) What is the sensitivity of the screening test? b) What is the false positive fraction of the screening test? 6. BMI in children is approximately normally distributed with a mean of 24.5 and a standard deviation of 6.2. a) A BMI between 25 and 30 is considered overweight. What proportion of children are overweight? b) A BMI of 30 or more is considered obese. What proportion of children are obese? c) In a random sample of 10 children, what is the probability that their mean BMI exceeds 25? 7. A national survey is conducted to assess the association between hypertension and stroke in persons over 55 years of age. Development of stroke was monitored over a 5 year follow-up period. The data are summarized below and the numbers are in millions. Developed Stroke Did not Develop Stroke Hypertension 12 37 No Hypertension 4 26 a) Compute the incidence of stroke in persons over 55 years of age b) Compute the relative risk of stroke comparing hypertensive to non-hypertensive persons c) Compute the odds ratio of stroke comparing hypertensive to non-hypertensive persons 8. Answer True or False to each of the following a) If there are outliers, then the mean will be greater than the median. b) The 90th percentile of the standard normal distribution is 1.645. c) The mean is the 50th percentile of any normal distribution. d) The mean is a better measure of location when there are no outliers.

I can put the previous answers into Excel, but it will take some time, and it won't be as pretty.

I would suggest that you post these additional questions as a new question so that another expert can work on them while I'm moving all the previous work to Excel.

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.

JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.

Web sites like justanswer.com/legal ...leave nothing to chance.

Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.

Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.

I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.Freshfield, Liverpool, UK

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.DianeDallas, TX

Meet The Experts:

SusanAthena

Master's Degree

Satisfied Customers:

102

Tutor for Algebra, Geometry, Statistics. Explaining math in plain English.