NCSU analytic面经

一共五个人来面，有faculty，coordinator，不同背景的人。
behavior： 问为啥申请analytic，对analytic有什么认识。
Technical：问linear regression。非术语解释linear regression。
问你对这个program有什么contribution。（楼主说自己会找个工作，不会拖累他们的placement，实在想不出来其他的。。。把他们都逗乐了）
问你对这个program有什么问题。
面试总共12分钟左右，非常快。楼主面试前准备了一些统计term的解释，分享一下给大家参考吧。给自己攒RP。
[align="left"]Linear regression: an approach to modelingthe relationship between a scalar dependent variable y and one or moreexplanatory variable x.[/align][align="left"]P-value: the probability ofobtaining a test statistic at least as extreme as the one that was actuallyobserved, assuming the null hypothesis is true. Aresearcher will often reject the null hypothesis when the P-value turns out tobe less than a certain significance level.[/align][align="left"]Type I Error: the incorrect rejectionof a true null hypothesis.[/align][align="left"]Type II Error: failure to reject afalse null hypothesis.[/align][align="left"]Mode: the most frequent orcommon score in the distribution.[/align][align="left"]Positively skewed: it has a tail extendingout to the right.[/align][align="left"]Negatively skewed: it has a tail extendingout to the left.[/align][align="left"]Standard deviation: it is an indicator of thevariability of a set of continuous scores around the mean.[/align][align="left"]Variance: The variance of a set of scores is simply thestandard deviation of that set of scores squared.[/align][align="left"]Statistical Inference: statisticalinference makes use of information from a sample to draw conclusions about thepopulation from which the sample was taken.[/align][align="left"]Central Limit TheoremThe Central LimitTheorem states that whenever a random sample of size n is taken from anydistribution with mean μ and variance

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, then the sample mean

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will be approximately normallydistributed with mean μ and variance

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/n. The larger the value of the samplesize n, the better the approximation to the normal. Quartile: values that divide a sample of data into fourgroups containing equal numbers of observation.Coefficient of Variation:t is the ratio of the sample standarddeviation to the sample mean:

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QQ plot: it is used to see if a given set of datafollows some specified distribution. It should be approximately linear if thespecified distribution is the correct model.Power: the probability of rejecting the nullhypothesis when the null hypothesis is false.[/align]