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!
Question
When testing subjects for HIV in surveillance studies WHO protocol states that subjects whose test result is negative on the first test should be classified as 'HIV negative'. Subjects whose test result is positive on a first test should be retested twice and classified as 'HIV positive' if one or both of these retests are positive. If both of the retests are negative then the subject is classified as 'HIV negative'.
Let the sensitivity of a single test be x and the specificity be y. Write down, in terms of x and y the sensitivity and specificity of the tests carried out under the WHO protocol. Use these expressions to compare the effects of using the WHO protocol as opposed to using a single test. Discuss some of the advantages and disadvantages of the WHO protocol versus the single test. Give the assumptions that you have made in carrying out calculations.
The number of viewers of American Idol has a mean of 29 million with a standard deviation of 5 million. Assume this distribution follows a normal distribution.
Each student in an experiment was told to look at 100 cars and count the number of people wearing the seat belts. The mean score for the class was found to be 44, and standard deviation =7
Using random numbers of 0.1562, 0.9821, 0.3409, 0.5594, and 0.7758, compute the time required for each of five simulated maintenance checks of the airplaine's landing gear.
Construct a 99% confidence interval for the average length of usage time to recharge.
Let's further suppose that there was good interrater reliability on these frequency counts of behaviours and that they are interval/ratio level of measure, normally distributed, and independent observations.
Uniformly distributed in the interval -0.5 cents to 0.5 cents. What is the probability that the round-off error exceeds 0.3 cents or is less than -0.3 cents?
A. What is the coefficient of determination? B. What is the correlation coefficient? C. What is the sampl mean of Y?
What is meant by the probability of an event? Discuss how addition and multiplication techniques are used to solve probability problems.
Using data on average school grade for first use. Use the t test to conduct a one-tailed test of the null hypothesis, assuming that the average grade is higher for males than for females
Why is expectation important? Explain what the expected value of an experiment or a business represents. What does it mean to have an expected value of 0? Provide an example of expectation and the use of the formula for expected value.
Chi square compares actual data with expected data. What would the expected data be? For example, if I know the percentage of brown M&Ms in a bag is 40% set by the company
Write Cumulative distribution function.Find the cumulative distribution function F(x).
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