Statistics Help Requested - Bayes' Theorem posterior odds > 1

[Tenaciousjeebs]

Hi All,

I took an antigen test yesterday and was trying to create a tool to help me interpret the results via Bayes' Theorem. I used actual sensitivity and specificity numbers from the CDC, calculated odds of test results given presence of condition, true/false positive/negative rates, and finally presence of disease given test result. One of the posterior odds is greater than 1, which doesn't make sense to me. Can anyone help me understand if this is a valid result or if I've made a mistake in my calculations or methodology? I think I've attached my workbook, please refer to the "Duplicate" tab.

Best,

Scott

[6StringJazzer]

No file attached. The paper clip icon does not work for attachments. To attach a file:

1. Under the text box where you type your reply click the Go Advanced button.
2. On the next screen scroll down and under the Attachments section click the Manage Attachments link, which will show a pop-up window.
3. Click the Choose File button to select a file to attached.
4. Click the Upload button to upload the file.
5. Then click the Close This Window button. Your file is now attached to your post.

[Tenaciousjeebs]

Hi, I tried to attach it originally matching your steps but it doesn't seem to have worked. I just did the same thing - please let me know if the file is now available.

Best,

Scott