Question: From a simple random serological sample of 1000 runners selected from 10,000 who completed the 2007 Chicago Marathon, 35 were found to be positive for

From a simple random serological sample of 1000 runners selected from 10,000 who completed the 2007 Chicago Marathon, 35 were found to be positive for steroids and other performance-enhancing drugs. When categorized by completion time, the results were as follows:

Completion Time (h)

Under 2.5 2.5-4.0 Over 4.0

a. What is the standard error of the estimated proportion positive?

b. From inspection (without making calculations) of the rates given above, would you feel that stratification may have resulted in a substantially better estimate? Why or why not?

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Statistical Sampling To Auditing Questions!

Sample Final Mat 117 Prof. Kazlow All questions are worth 3 points each. You may use a scientific, graphing or statistical calculator. You may not use a cell phone, pda, or computer on this exam....

Wheaton etal paper on Construction Costs over time: Write one pg report with references... citations MLA or Harvard style after reading attached article. I will also attach my paper which I got a low...

Confirming Pages C H A P T E R 19 Analyzing Information and Writing Reports Chapter Outline Using Your Time Efficiently Analyzing Data and Information for Reports Identifying the Source of the Data...

ID Grip Strength (X) (X-Mean)2 98.5 3.4596 Histogram of Grip Strength in male EXSC 415 students $5.5 1.2996 10 95.0 2.6896 98.0 1.8496 126.5 891.6196 90.0 44.0896 114.0 301.3696 108.0 129.0496 124.0...

Would you be able to put together another monthly cash flow analysis, this time for year 1? INCOME STATEMENT Year 1 269,115.00 48,930.00 20,388.00 338,433.00 $ $ $ $ COGS $ 113,940.00 $ 125,940.00 $...

Research Recherche Family caregiver burden: results of a longitudinal study of breast cancer patients and their principal caregivers Eva Grunfeld, Doug Coyle, Timothy Whelan, Jennifer Clinch, Leonard...

The OB/HR Matrix Organisational Behaviour Concept HR Management Function The Link to HR Management Organisational Culture Employee Involvement and Relations Ethics Management Organisational Design...

Occupational Stress in Organizations and Its Effects on Organizational Performance Henry Ongori and Joseph Evans Agolla Abstract Human resource practitioners, counsellors, professionals and managers...

\fThis is an electronic version of the print textbook. Due to electronic rights restrictions, some third party content may be suppressed. Editorial review has deemed that any suppressed content does...

1 Executives at Mega Mart Supermarket claim that a typical family of four spends $250 weekly on routine, non-holiday, grocery purchases. According to published industry standards, the population...

In a press release dated December 3, 2018, Bristol Myers Squibb disclosed the following with respect to its pension plans (excerpted). NEW YORK (BUSINESS WIRE) Bristol-Myers Squibb Company (NYSE:...

You have been granted with a chance of profit. Someone from your family lent you $100,000 without any interest rate, for one year. You have two options to invest this capital, so that when you pay...

In a bond indenture, subordination is the stipulation that subordinate creditors agree to wait until all claims of the senior debt are satisfied.

What is the amount to which $1550 will grow from June 10, 2016, to December 15, 2016, at 6.5%?