This preview shows page 1. Sign up to view the full content.
Unformatted text preview: standard distance from the mean. sample variance: The sum of the squared deviations divided by df = n-1. An unbiased estimate of the population variance. sample standard deviation: The square root of the sample variance. degrees of freedom: The number of scores in a sample that are independent and free to vary with no restriction. df = n -1. biased statistic: A statistic that, on average, consistently tends to overestimate (or underestimate) the corresponding population parameter. unbiased statistic: A statistic that, on average, provides an accurate estimate of the corresponding population parameter. The sample mean and sample variance are unbiased statistics....
View Full Document
This note was uploaded on 04/08/2011 for the course PSY 216 taught by Professor Cynthiaingle during the Spring '11 term at KCTCS.
- Spring '11