Small class - t-test in practice

Description:

In a first semester introductory course for the bachelor of chemical engineering program we notice that students have a hard time grasping the concept of statistical tests for deciding if data are in agreement with a known, true mean, or if two sample means are significantly different. To us teachers it seems like problem sessions with teacher guidance (TØ) are great, but that teacher resources are easily consumed by the tedious task of showing students which buttons to press in Excel.
To free up teacher time in class deeper interaction with the students about statistics and and how mean and standard deviation relate to terms like accuracy and precision, I have created a learning design based on the STREAM model using screencast resources and an online quiz to construct an out of class loop and make sure that students know the basics when they arrive for the in class teaching. The screencast resources should also be useful for the students in connection with later laboratory exercises and lab report hand-ins, contributing to alignment on the course.
The e-tivity included in the first out of class phase is a quiz which serves a dual purpose. 1) The quiz has a deadline before the in class teaching date, assuring student participation in the out of class activities. 2) The quiz serves an assessment purpose to evaluate the effectiveness of the out of class activities. This e-tivity reaches stage 4 in the 5-stage model, as it is intended to help students construct knowledge from hands on experience.