Song He's voice came from the classroom, amplified several times through the microphone. Even standing on the stairs, Tan Xi could hear him clearly.
"Students, turn to page 18! Those with computers, turn them on. Those without computers, get your paper and pens ready. We're going practical!"
"There are four errors and six suspicious points in this set of data on the big screen. You have three minutes to calculate them mentally! The minimum requirement is to identify the errors accurately. As for the suspicious points, crack as many as you can!"
"Those with computers must provide precise values. Those with only paper and pens, lay out your steps clearly!"
Tan Xi hesitated. He didn't dare walk toward the classroom entrance. So what if he couldn't see the screen? By listening to what was said afterward, he could probably still judge Song He's level.
The three minutes passed in a flash, and Song He's voice rang out again.
"Stop!"
"Who finished? Raise your hands. Very good! Ten students! Write your answers and names on the paper, then hand them in now!"
"Next, I'll explain the conventional way to process this set of data! First, merge the expression matrices and remove genes with low expression and low variation! Second, use linear ridge to perform Ridge Regression Analysis! Drug sensitivity needs to be modeled using training-set data!"
"Third, cross-validation. Pretend you don't know a cell line's drug response, predict it using data from all the other cell lines, then perform a correlation analysis between the predicted and actual values!"
As Tan Xi listened, he let out a disdainful snort.
Nothing special. It's all basic knowledge and tired old material!
"Everything up to this point is conventional. If you can't keep up, you're in trouble!"
"Next, I'll explain some ingenious methods!"
"For the