Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
A new drug designed to control neuropathic pain needs to be tested using pain score measurements (on a scale of 0 - 10; 0 = no pain). Clinicians think that a standard deviation of 2 for the pain score would be a suitable value. For the drug to be carried forward a minimum decrease in the pain score of 1 is needed.
(a) Suppose that the trial is designed to have 90% power to find a minimum treatment effect of 1 at a 5% significance level. What would be a suitable sample size?
(b) Suppose that the power is changed to 80%, what is a suitable sample size now?
(c) Suppose that the trial only recruited 300 patients, what would be the minimal treatment difference that could be detected with 80% power?
(d) What if the minimal treatment difference is changed to 2 (but the power remains at 80%), and that we want the patients allocated to the two arms in the ratio 2:1. What would be an appropriate sample size?
Additional Information
This kinds of question lies from Statistics and it is about a proposed study for a new drug controlling neuropathic pain. A scale of measurement for pain management has been taken and to know if the drug works, the scale must come down by at least 1 point. The solution discusses the various questions about this study.
what is the probability that a salesperson selected at random will have an excellent potential for advancement given
Show that it satisfies the required condition for being a probability distribution.
information about a regression analysis includes an intercept of 59.99 and a negative slope of 1.49. make a prediction
a cast a die a number of independent times until a multiple of 3 appears on the top side of the die. find the
the study found 87 per cent of 1500 australians surveyed would support colour-coding on packaged food to indicate
An entrepreneur is considering the purchase of a coin-operated laundry. The present owner claims that over the past 5 years, the average daily revenue was $675 with a standard deviation of $75.
A study of accounts receivable at the A&W Department Store indicates that bills are either current, one month overdue, two months overdue, written off as bad debts, or paid in full.
A management trainee is selected at random. What is the probability that the person selected is a female who did not attend college?
You are picking up apples from a tree in a park. You are interested in estimating the mean weight of all apples in the park. Unfortunately you have only been able to find seven apples so far. Can you use the Central Limit Theorem to aid in your es..
Standard deviation of 50. what is the probability that next year the number of burgalaries will be less than 250? less than 300 and more than 350?
a box of candy contains 25 candy bars of which 10 contain peanuts and 15 do not contain peanuts. if you select five
Evaluate a simple aggregate price index for 2004. Use 2000 as the base period - Estimating the simple aggregate price index.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd