# pooled

1. ### Graph trend line from meta-analysis (multiple pooled studies)

Hi! I have searched the web and have found no convincing answer, although this should be pretty easy. My question separates into 2: 1- Is it reasonable to trace a trend line of the evolution of a parameter over time from the pooling of different studies, each of which do not contain all time...
2. ### (A Possible) Pooled P-Test Problem

Historical data shows that 4% of the components produced at a certain manufacturing facility are defective. A particularly harsh labor dispute has recently been concluded, and management is curious about whether it will result in any change in this figure of 4%. A random sample of 500 items...
3. ### Pooled GLS and POLS

Hello everyone, This semester I'm studying, OLS, GLS, RE, FE, MLE, and a lot of beautiful concepts :D. But I get a little bit concerning the different assumptions of each model and their difference. Here is what I need to answer and I will say what I've understood/found so far thanks my...
4. ### Using pooled data formula or not?

The question is: Broken arms can be treated with surgery or splints. In a study with 200 patients, half had surgery and half used splints. In the surgery group, 80 patients showed improvement after 2 months whilst 50 who used splints improved. Is surgery more effective than splints for...
5. ### Estimate individual variance from pool variance

Let's say I have a group of 100 tiny beads, and I want to know the variance in their weight. However, my scale can't weigh one bead at a time, so I weight them in non-overlapping pools of 10 beads each. Then I can calculate the variance among pools, but what I really want to know is the...