Day 18: Normal Calculations with a Twist
We are working on the concept of z-scores and the associated skill development in AP Statistics. I found this awesome and easily implemented activity at Teaching Statistics blog. This particular self-checking activity was shared at the Made4Math blog.
There are problems on the front and answers on the back, but the twist is that the answer on the back goes with a different problem. So students pick any first card, work out the problem, find the answer on a different card, then turn it over for their next problem to solve. The set has a nice mix of given a data value, find the probability, or given the probability, find the data value. We actually spent two days on this practice activity (approximately 15 minutes each day): the first day they did the problems using the Standard Normal Table without a calculator and the second day they used the calculator commands: normcdf( and invnorm(.