Popcorn experiment

Experiment conducted by Jianjian Gong, Chongqing Yan, and Lihua Yang circa 1992. The experiment tried to determine, among three brands of popcorn, which lead to the highest proportion of popped kernels. Power study showed that four replications was needed, but ressources allowed only two replications. This is a completely randomized 3 by 2 by 3 balanced design with 2 replications.

Usage

popcorn

Format

A data frame with 36 rows and 4 variables:

brand

[factor] brand of the popcorn 3.5 ounce package, one of two national brands and one local brand

power

[factor] power rating of the microwave, either 500W or 600W watts

time

[factor] cooking time, either 4, 4.5 or 5 minutes

percentage

[double] percentage of popped kernels out of the bag

Source

Section 7.4 of Dean, Voss and Draguljić (2017).

References

Dean, A., Voss, D., & Draguljić, D. (2017). Design and analysis of experiments. Springer.