# stats

 .remove_background_ad { border: 1px solid #555555; padding: .75em; margin: .75em; background-color: #e7e7e7; } .rmbg_image { max-height: 80px; } Estimated St. Error is an estimate of the st. error of the sampling distribution of the M. Est. St. Error of the Sampling Dist of M sample st.deviation / square root of n t statistic is formed whenever a statistic has a normal sampling distribution (M) is transformed by subtracting the mean of the sampling distribution and dividing by est of the st error (sample) Comparison of t and z distrib 1. t and z both have means that equal 02. t and z both have distributions that are symmetric about the mean.3. t dist are more variable than the z 4. Shape of a t changes with sample size Degrees Of Freedom is the number of degrees of freedom for a statistic equals the number of components in it's calculation that are free to vary. so, 1/5 are fixed and 4/5 are free to vary. n-1 Robust a statistic is robust if it gives fairly accurate results even when an assumption is violated. Delta is used to locate power. Authorfamay ID74529 Card Setstats Descriptionmue w.o st.deviation Updated2011-03-22T21:00:39Z Show Answers