Question: There has been debate among doctors over whether surgery can prolong life among men suffering from prostate cancer, a type of cancer that typically develops

There has been debate among doctors over whether surgery can prolong life among men suffering from prostate cancer, a type of cancer that typically develops and spreads very slowly. Recently, The New England Journal of Medicine published results of some Scandinavian research. Men diagnosed with prostate cancer were randomly assigned to either undergo surgery or not. Among the 347 men who had surgery, 16 eventually died of prostate cancer, compared with 31 of the 348 men who did not have surgery.
a) Was this an experiment or an observational study? Explain.
b) Create a 95% confidence interval for the difference in rates of death for the two groups of men.
c) Based on your confidence interval, is there evidence that surgery may be effective in preventing death from prostate cancer? Explain.

Step by Step Solution

★★★★★

3.29 Rating (175 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a This is an experiment Men were randomly assigned to have surgery or not b Randomiza... View full answer

Question Has Been Solved by an Expert!

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

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

662-M-S-S-I (4383).docx

120 KBs Word File

Students Have Also Explored These Related Statistics Questions!

For some time there has been debate about whether regular large doses of vitamin C reduce the chance of getting a common cold. a. Explain how you could design an experiment to test this. Describe all...

The Nori & Leets Co. is one of the major producers of steel in its part of the world. It is located in the city of Steel-town and is the only large employer there. Steel-town has grown and prospered...

In recent years, the debate over the U.S. economy has been constant. The electorate seems somewhat divided as to whether the economy is in a recovery or not. Suppose a survey was undertaken to...

Prostate cancer There has been debate among doctors over whether surgery can prolong life among men suffering from prostate cancer, a type of cancer that typically develops and spreads very slowly....

31. Prostate cancer There has been debate among doctors over whether surgery can prolong life among men suffering from prostate cancer, a type of cancer that typically develops and spreads very...

Prostate cancer. There has been debate among doctors over whether surgery can prolong life among men suffering from prostate cancer, a type of cancer that typically develops and spreads very slowly....

Please read attached and Critique: Write critique of the paper. Do you agree with the author that statistics is important? Why? Feel free to provide your own examples of a valuable statistical study....

In a process, solid MX2 is reacted with water vapor-Y2 gas mixture (Y2 inert gas) to produce solid metal oxide (MO). A mixture of water vapor-Y2 with 90% water vapor (by volume) is passed over MX2 at...

Each year, Forbes magazine compiles a list of the 400 richest Americans. As of September 17, 2008, the top 10 on the list are as shown in the following table. Person Wealth ($ billions) William Gates...

Drag and drop the appropriate words to complete, A Partnership Probably Does Not Exist if Shared Profits Were Received as Payment of Any of the Following: a. A debt by or interest on a loan. b. Wages...

Why is it important for a company to have a good and personal relationships to representatives of the media?

College students Diane Glover and Esmeralda Olguin asked 25 men and 25 women how many speeding tickets they had received in the last three years. Men: 14 men said they had 0 tickets, 9 said they had...

The histogram of marathon times includes data for men and women and also for both an Olympic marathon and an amateur marathon. Greater values indicate slower runners. a. Describe the shape of the...

A StatCrunch survey asked people about their consumption of soda as a percentage of liquid intake. The data for 130 males and 130 females can be found at this texts website. Compare the two groups...

To promote the sale of some specialty goods, Teal Mountain Ltd . began a generous return policy for its customers. Customers can return merchandise for up to three months following the date of the...

Brief Exercise 12-4 Direct versus Indirect Method L04 Brief Exercise 12-4 Direct versus Indirect Method 2-4. 12-5 For each of the Murrains items, indicate whether it would appear on a statement of...

Chapter 14 Exercises/Problems Assignment Saved Help Save & Exit Submit 100 Check my wote 7 Perit Industries has $140,000 to invest. The company is trying to decide between two alternative uses of the...