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!
Q1. For this assignment you will be provided with 2 clinical research questions on sample size and one published paper to determine the power of the primary outcome measure reported in the study.
Q2. A survey is being planned to estimate the prevalence of secondary infertility amongst couples aged 20-45. The investigators expect the prevalence to be 10%, and would like to estimate it to within 5% of the true value (with 90% confidence). How many couples are required?
Q3. A previous small study was investigating the total cost of 10 specific items of fruits and vegetables which were sold in 3 supermarkets compared to that were sold in 3 local corner shops. On average the total cost of 10 specific items of fruits and vegetables which were sold in local corner shops was £5.50. It was suggested that the total cost of those fruits and vegetables which were sold in supermarkets was 50% cheaper than the local corner shops, with a common standard deviation of 1.65. Use the PS power calculator to find out how many supermarkets and local corner shops are required (assume equal group) , if we are going to conduct a similar study to investigate the difference in cost of this size, with 90% power and using a 1% significance level?Q4. Read the paper titled "Plasma Fetuin -A is associated with the Severity and Cognitive Impairment in Mild to moderate Alzheimer's Disease" Edward R. Smith, RaminNilforooshan et al. Journal of Alzheimer's disease, 2010.
Identify the primary outcome measure and calculate using PS-sample size program to determine the power of the primary outcome measure, stating clearly the measures that were used to arrive at the result. Use 0.05 as type I error for the calculation. Also comment on the value of the difference whether this was clinically relevant or not.
When calculating confidence interval estimates...how is the x and standard deviation calculated? How to calculate one sided 95% confidence limits for a proportion.could you provide a formula ?
For each of following data sets, select the most suitable response from choices below the table. A strong negative linear relation exists.
To determine her blood pressure, Carolyn divides her day into three parts; morning, afternoon, and evening. She then measures her blood pressure at 4 randomly selected times during each part of the day. What type of sampling is used?
If person is selected at random determine the probability that he/she has enzyme level less than 4.0 units/ml?
The union for a particular industry has determined that the standard deviation of the daily wages of its workers is $20.. A random sample of 100 workers in this industry has a mean daily wage of $116.
The time a cashier spends processing individual customer's order are independent random variables with mean 2.5 minute and standard deviation of 2.
medical tests were conducted to learn about drug-resistant tuberculosis. of 142 cases testedin new jersey 9 were found
a box has ten coins. six of the coins have a probability of heads 310. the other four coins have probability of heads
A SRS of size 16 drawn from a Normally Distributed population has a mean of 30 and a standard deviation, s, of 5. With 95% confidence, what is the interval that captures the true mean of the population?
city officials in fort lauderdale florida are trying to decide whether to evacuate coastal residents in anticipation of
If they would like to estimate the true average time to within 1.9 minute (with 95% confidence) what sample size should they use? (remember to round to the next largest integer.)
Consider the following exponential probability density function: This number represents the time between arrivals of customers at the drive-up window of a bank.
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