This headline popped up in my newsfeed this morning: Boys will be boys: Data error prompts U-turn on study of sex differences in school (Retraction Watch, 2017) The article is about a peer-reviewed article on self-regulation of study habits that was published earlier this year. In the retraction, the authors noted they had discovered a […]

Simple Regression Part 3

When you are given raw data on a test, solving the problem using technology is relatively simple. But when you are given intermediates or partial solutions, the task becomes a bit more difficult since most software is not set up to work on intermediates. Consider the following problem: A scientist employed simple linear regression to […]

What to do about outliers?

The most recent assignment in my BUS 430 class was on simple linear regression. In some of the data sets, there are data points that seem to be inconsistent with the bulk of the data. One student called this to my attention and asked if he should just ignore those data points because they were […]