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Descriptive Statistics Powerpoint
Descriptive Statistics Powerpoint

... Interquartile range Percentiles ...
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Notes from Lecture 13

... We hypothesize that IMF loans cause more political instability. H0 for our regression slope = 0. HA 0. We calculate a regression line. The slope coefficient on IMF loans is 2, with a standard error of 1. Our test statistic is a t score. It is known as a t-ratio since it boils down to just the coeff ...
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School Profile - Gonzaga College High School

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Confidence Intervals for two means

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... sample measured at two different points in time. The classic example is BEFORE and AFTER observations on subjects in an experiment. Here the two sets of observations are RELATED rather than independent. These are called paired samples. Once again, a different type of t-test must be used. ...
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templar_AQA_AS_stats_5831 - Hertfordshire Grid for Learning

< 1 ... 225 226 227 228 229 230 231 232 233 ... 280 >

Student's t-test

A t-test is any statistical hypothesis test in which the test statistic follows a Student's t-distribution if the null hypothesis is supported. It can be used to determine if two sets of data are significantly different from each other, and is most commonly applied when the test statistic would follow a normal distribution if the value of a scaling term in the test statistic were known. When the scaling term is unknown and is replaced by an estimate based on the data, the test statistic (under certain conditions) follows a Student's t distribution.
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