Unformatted text preview: standard distance from the mean. sample variance: The sum of the squared deviations divided by df = n1. 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....
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 Spring '11
 CynthiaIngle
 Psychology, Standard Deviation, population variance, distribution. deviation score, parameter. unbiased statistic

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