5. An article in the British Medical Journal provided the following discussion of success rates in kidneystone removals. Open surgery had a success rate of 78% (273 patients out of 350) and a newer method,percutaneous nephrolithotomy (PN), had a success rate of 83% (289 patients out of 350). This newermethod looked better but the results changed when stone diameter was considered. For stones withdiameters less than 2 centimeters, 93% (81 patients out of 87) of cases of open surgery were successful,compared with only 87% (234 patients out of 270) of cases of PN. For larger stones, the successrates were 73% (192 patients out of 263) and 69% (55 patients out of 80) for open surgery and PN,respectively.Open surgery is better for both stone sizes, but less successful in total. This apparent contradictionwas pointed out by the statistician E. H. Simpson in 1951, and is known as the Simpson's paradox.Explain how open surgery can be better for both stone sizes but inferior overall. (

Given: Here, stone size Open Surgery PN Large Kidney stone 192263 5580 Small Kidney stone…

Answered: 5. An article in the British Medical…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

Please see below. I only have one attempt at this. I really need help with this. Does duct tape work better than cryotherapy for removing warts in children and young adults? Of 26 patients treated with duct tape, 22 showed complete wart remission. In comparison, 15 of the 25 patients treated with cryotherapy achieved complete wart remission. Which test is most appropriate for this scenario? A. 2-sample test for means B. 1-sample z-test for proportions C. 2-sample test for proportions D. matched-pairs E. 1-sample t-test for means
How large a sample is needed to estimate the population proportion for each of the following?a. ME = 0.05; α = 0.01b. ME = 0.05; α = 0.10c. Compare and comment on your answers to parts a and b.
A special education teacher did research on whether or not there is a relationship between the number of students in his class and the number incidents of “acting out” behaviors exhibited by the autistic students in the classroom. He collects data for a year and aggregates them by month. He obtained the statistics below, r= -.863 R2=.74 b= -1.212294 a= 131.176598 10.) How does the presence of more students affect the incidents in the class? a) as students are added the incidences increase b) as students are added the incidences decrease c) the number of students does not affect acting out d) the number of students caused more incidents How much of the variability of acting out is explained by the number of students in the class?___________
E) what other questions might this raise about the results ?
You conducted additional studies with these men and found the following: The RR for those who drank one drink per day was 1.50 (95% CI:1.32-1.67) in comparison to the abstainers. For those men who drank three or more drinks per day the RR compared to the abstainers was 4.20 (95% CI 2.68-5.85). Which one of Hill’s criteria does this illustrate? Explain.
Answer the whole quesrion
thank you …
Please help by providing detailed workings. Answers to a minimum of 6 d.p. Thanks
Q4: please answer all the parts of the question with the work clearly showing
We're interested in whether warm milk helps people go to sleep faster. We have a lab with EEG monitors that will provide us with data as to how many minutes elapse before someone falls asleep. (People spend the night in the lab.) In the first experimental condition, participants fall asleep as they usually do, without warm milk. In the second condition, participants drink 6 oz. of warm milk before going to sleep. Data for 5 participants is shown in the table below. Choose the appropriate type of t- test (independent samples or paired samples) and conduct the t-test and hypothesis test. Be sure to show all of your calculations either on your scratch work or in this text box. DO: Include the t-test value and your hypothesis test conclusion in this test box, not just in your scratch work. Minutes to Minutes to NO MILK sleep MILK sleep Participant 1 10 Participant 1 11 Participant 2 10 Participant 2 12 Participant 3 8. Participant 3 8 Participant 4 17 Participant 4 13 Participant 5 13…
On average, a sample of n = 36 scores will provide a better estimate of the population mean than a sample of n = 49 scores from the same population.
In recent years the irradiation of food to reduce bacteria and preserve the food longer has become more common. A company that performs this service has developed four different methods of irradiating food. To determine which is best, it conducts an experiment where different foods are irradiated and the bacteria count is measured. As part of the experiment the following foods are irradiated: meat, poultry, veal, tuna, and yogurt. The results are shown below. True or False: It can be inferred at the 5% significance level that at least two of the treatments differ.

SEE MORE QUESTIONS

Recommended textbooks for you

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

SEE MORE TEXTBOOKS