PSYB01H3 Chapter Notes - Chapter 13: Type I And Type Ii Errors, Null Hypothesis, Toothpaste
Document Summary
Null hypothesis= no difference in population means between number of cavities in children who use brand x toothpaste and in children who use brand y toothpaste. Research hypothesis=there is a difference in population means between the number of cavities in children who use brand x toothpaste, and in children who use brand y toothpaste. Type ii error when we conclude that the population means are equal, when population means aren"t equal. In other words, we conclude that there was no difference in the number of cavities between children who used brand x or brand y toothpaste in the population, based on our sample data. The probability of type ii error is a function of p-value, effect size, and sample size . Probability of type i error: . 05 (i. e. your p value.
