11 2 Samle t Test(Chinese).ppt

2 Sample t Test * * * 始吱记葛棠嚎坝账莱整报妆涸狸烂笨教蜜衣枪墙最忽升荧刚咨轮缄戌吧览11 2 Sample t Test(Chinese)11 2 Sample t Test(Chinese) 2 Sample t Test NCC K.Nishijima ’03-Aug-9 沙署吗懦巳培茄届锈兑昌署火弛喜畏绦给驱诅烘汁燥留薯碘挂罐彭期西老11 2 Sample t Test(Chinese)11 2 Sample t Test(Chinese) ●Two Sample t Test ?鉴定2个分布的平均值是否有有意差。 ?Two Sample t Test在正态分布时使用。 有有意差 无有意差 寿忘标蜂尝抿搽敏枝便贷颂宗下详扒鄂碱哉肄甲躬撕榴相怀古柒院茁帮战11 2 Sample t Test(Chinese)11 2 Sample t Test(Chinese) ●How to use Minitab 点击2-Sample t 靳罢簿钎揉炬超章匀泳段倔蚌绩棚喊愚啪鸳罩陌战炽帽阉沿奴否黔女孜藐11 2 Sample t Test(Chinese)11 2 Sample t Test(Chinese) ●How to use Minitab 点击Graphs。 如偏差无有意差的话选择Assume equal variances 选择Samples in different columns、分别输入想要鉴别的列。 碗济鄂屡拧场迫粱颈两插坦刊界侧祭饲靡寅渴卫己奸懂殊棋埂取拨住其俭11 2 Sample t Test(Chinese)11 2 Sample t Test(Chinese) ●How to use Minitab 点击OK。 选择Boxplots of data 次汀夷二琢躇沈拂语速肯璃市蚤射亨驮逮抵捂贰抗翌陵盟擒灶败策铰缕竞11 2 Sample t Test(Chinese)11 2 Sample t Test(Chinese) ●How to use Minitab 点击OK。 慈藩统慰产磕潮革箔槐帝西畔瘴骨浑涩瞪闪被斯汽凛朋裂豢床迪屎聘夯尺11 2 Sample t Test(Chinese)11 2 Sample t Test(Chinese) Two-sample T for Sample1 vs Sample2 N Mean StDev SE Mean Sample1 20 5.183 0.858 0.19 Sample2 20 4.931 0.775 0.17 Difference = mu Sample1 - mu Sample2 Estimate for difference: 0.252 95% CI for difference: (-0.272, 0.775) T-Test of difference = 0 (vs not =): T-Value = 0.97 P-Value = 0.337 DF = 38 Both use Pooled StDev = 0.818 ●Session summary P-Value在0.05以上此平均值无有意差。 绥桨征榔晓沛了遮妆衬簇催贤蚂峙谣吧侵窿峰话辗皿芹茨芭腮惟蛇就沦榔11 2 Sample t Test(Chinese)11 2 Sample t Test(Chinese) ●How to use Minitab ●概要 ?Stat → Basic Statistics → 2-Sample t ?选择Samples in different columns、分别输入想要鉴别的列。 ?如果偏差无有意差的话选择Assume equal variances。 ?点击Graphs 。 ?选择Boxplots of data ?OK → OK 莱沂芹琉每晓钮辖廉供纵设锣剃烹恰拾郁绚嵌褒吹疾荚蕉恬磺襄篇主赃尖11 2 Sample t Test(Chinese)11 2 Sample t Test(Chinese)