The blood test result is positive, with a likelihood ratio of 6. To calculate the probability the patient has Zika:Convert the pre-test probability to odds:0.7 / (1 – 0.7) = 2.33. Use the formula to convert pre-test to post-test odds:Post-Test Odds = Pre-test Odds * LR = 2.33 ...
However, it is not clear to me how to calculate: I2 - I can get this approximately via an inelegant route, however I should like to know more and how to obtain this information directly from that stored in e. How is this calculated? The precise value given in the metareg immediately ...
How to calculate the equity you have in your home Key terms Home equity Your equity is basically the difference between your home’s value and the amount you owe on your mortgage (and any other loans against the home). Loan-to-value ratio (LTV) ...
The p-value approach to hypothesis testing uses the calculated probability to determine whether there is evidence to reject the null hypothesis. This determination relies heavily on the test statistic, which summarizes the information from the sample relevant to the hypothesis being tested. The null h...
As you have seen, it is easy enough to calculate a likelihood ratio test "by hand." However, you can also use Stata to store the estimates and run the test for you. This method is easier still, and probably less error prone. The first line of syntax runs a logistic regression model,...
A hazard ratio is the ratio of two hazard functions where a hazard function describes the chances of an event occurring within a group at a particular time. It’s commonly used to evaluate the effect of a particular drug on a disease.
Explain how to calculate the Probability Mass Function (PMF) from the Cumulative Distribution Function (CDF). What happens if you try to compute maximum likelihood estimators for a random variable which is uniform on [\alpha,\beta]? a. Set up the likelihood function, and ...
To perform ratio analysis over time, select a single financial ratio, then calculate that ratio at set intervals (for example, at the beginning of every quarter). Then, analyze how the ratio has changed over time (whether it is improving, the rate at which it is changing, and whether the...
To calculate return on investment, you need to include salaries and all associated marketing costs. For example, say you paid $200 for a PPC specialist to set up this ad plus $50 to the copywriter who wrote the ad. The general formula for calculating ROI: ...
Down payment. Making a large down payment helps to reduce the amount you borrow, which means you pay lower interest charges. It can also reduce the likelihood that you become upside-down on your loan.Car age. Typically, the older the car, the higher the rate. If you want to buy a ...