I recently asked a question about Simpson's paradox. Suppose we are concerned about making some choice about an arbitrary element of a population. Recall that Simpson's paradox arises when the answer ...
Simpson's paradox is a classic puzzle discussed in introductory statistics courses worldwide. However, my course was content to simply note that a problem existed and did not provide a solution. I ...
The statistical analysis of experimental data that I have to perform could be described as follows. Three drug treatments $D_1$, $D_2$ and $D_3$ were tested across three groups $G_1$, $G_2$ and $G_3$. ...
I am preparing for my statistics final and have this question in the review package to answer: I understand the hypothesis portion of the question. How should I approach the first question: Can the ...
I have a question about something that my statistics teacher said about the following problem: There are two hospitals named Mercy and Hope in your town. You must choose one of these in which to ...
Consider a scenario where a two-way contingency table is analyzed by a chi-squared test of independence and a significant result is found. Now, it turns out that this table is an aggregation of data ...
I have a bunch of points that belong to one of population P1, P2, ... Pn AND to class A or B. Within each population I'll be doing classification between A and B, and I want to select features that ...
I’m reviewing an article, and can’t give details but here is the situation, and it’s got me puzzled Patients were divided into 4 categories (call them A B C and D), which were exhaustive and ...