01:830:200 Lecture Notes - Lecture 4: Type I And Type Ii Errors, Confidence Interval, Asteroid Family

• School: Rutgers University
• Department: Psychology
• Course: 01:830:200
• Professor: Dr. Kilianski

Document Summary

Without a population mean, you use the chance level of performance on some set of values. Ex. if 10 students were asked to randomly predict the type of card out of a deck of 25, with 5 types of card, for you"d use the probability of them getting a hit as . In another case, the sample scores are compared to a standard value ( true. Type i error: rejecting the null when the null is true (probability of occurring is the same as alpha level. Type ii error : inverse of type i; accepting the null when the null is false (probability of occurring is 100 - alpha level) Frequency distribution of an infinite number of differences between pairs of sample means. Similar to sampling distribution of the mean, but values along the x-axis represent differences between sample means. Mean value is 0, representing no difference between pairs of means.