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standard errors and confidence interval
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2020-3-25 15:25
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The standard error of the sample mean is the standard deviation in sample means across samples , i.e. a measure of the variability (or uncertainty) in the sample mean across samples. What is meant by 95% confidence with regard to a 95% confidence interval for the mean ? ...
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个人分类: R 学习|2109 次阅读|没有评论
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the Pearson correlation coefficient (r) between X and Y
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2020-3-25 15:12
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If the Pearson correlation coefficient (r) between X and Y is 0, does this mean there is no relationship between X and Y ? NOOO!!! A correlation of zero implies that there is no LINEAR relationship between X and Y. It is possible that a strong curvilinear relationship can have a correlation c ...
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个人分类: R 学习|3088 次阅读|没有评论
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