Do you think pressure increases mean bleeding time and why

Assignment Help Basic Statistics

Reference no: EM131396728

In given Problem, use the standard deviations for bleeding times calculated from 43 bleeding times without pressure and from 39 bleeding times under pressure to decide whether bleeding time under pressure is more variable than bleeding time without pressure

Problem
To study whether or not pressure exerted on the upper arm increases bleeding time, 39 persons had their upper arm subjected to a pressure of 40 mmHg of mercury and their fingers pricked. Their mean bleeding time was 2.192 min, and the standard deviation of their bleeding times was .765 min. Forty-three other persons acted as controls. No pressure was used for the controls, and their bleeding time was found to have a mean of 1.524 minutes and a standard deviation of .614min. Give a 95% confidence interval for the difference in bleeding times. Do you think pressure increases mean bleeding time? Why?

Reference no: EM131396728

Questions Cloud

What are the real world implications of the study findings : What are the real world implications of the study findings? Are the results meaningful and important for clinical practice? To whom might these results apply

What positions might be more difficult to outsource : Outsourcing IT Positions As the chief information officer for a large organization, you consider outsourcing various positions within your department to save money. What are some types of positions that easily can be outsourced?

Perform an ergonomic assessment of an existing work space : Understand the relationship between the physical work environment and the employee's morale and performance.Apply principles of ergonomics to design a work space which meets the needs of the employee and produces a healthy and productive environmen..

What are the coordinates of the point : a) What are the coordinates of the point for which r>0, -2pi 0, 2pi

Do you think pressure increases mean bleeding time and why : No pressure was used for the controls, and their bleeding time was found to have a mean of 1.524 minutes and a standard deviation of .614min. Give a 95% confidence interval for the difference in bleeding times. Do you think pressure increases mean..

Social perceptiveness and behavioral flexibility : Social perceptiveness and behavioral flexibility are key components of: Effective managers are least likely to have which of the following traits?

Determine the subgroup generated : Determine the set S + S. Is it a subset of S? If H was a subgroup of Z8, what do you expect H + H to be? Determine the subgroup generated by S, i.e., the smallest subgroup of Z8 which contains S.

Will you accept this job offer or wait for additional offers : Contemplating a Job Offer After graduating from college with a degree in computer science, you send your resume to several companies. Almost immediately, you receive a job offer as a technical support representative in a midsized organization. Wil..

Discuss extrinsic reward to motivate a preschooler : In 250 words as a preschool teacher describe a situation in which you would use an extrinsic reward to motivate a preschooler. Discuss how these motivators could result in learned helplessness

User Account

All Pages