Cookie Science 7: How many to bake. Collecting good data means taking a large sample. Here’s how to find out how many tests you need to run.
Statistics: Make conclusions cautiously. Just one experiment isn’t enough to show that one test condition is better than another. Even with good statistics, scientists need to be careful about how they interpret their data.
Cookie Science 8: The meaning of the mean. With data in hand, Bethany can compare her different test conditions — using math.