Statistical power - Revision history

Heston at 20:58, 28 July 2016

2016-07-28T20:58:27Z

← Revisión anterior		Revisión del 20:58 28 jul 2016
Línea 6:		Línea 6:

	==Common Statistical Terms==		==Common Statistical Terms==
	*Type I error: H0 incorrectly rejected
	*Type II error: H0 incorrectly accepted		SYMBOLS
	*α: probability of type I error		*α: probability of type I error
	*β: probability of type II error		*β: probability of type II error
			*χ²: ≥ 2 percentages or proportions of categorical outcomes

			TERMS
			*ANOVA: compares means of ≥ 3 groups
			*Confidence interval: range in which real mean expected to fall
			*Negative skew: mean < median < mode
			*Positive skew: mean > median > mode
	*Power: probability of correctly rejecting H0		*Power: probability of correctly rejecting H0
	*↑ power ~~and ↓ β: ↑~~ sample size, ↑ expected effect size, ↑ precision of measurement		**to increase power increase sample size (most important), and/or increase expected effect size, and/or increase precision of measurement

	*Standard deviation: variability from mean		*Standard deviation: variability from mean
	*Standard error of the mean: variability between sample mean and true mean		*Standard error of the mean: variability between sample mean and true mean
	*Positive skew: mean > median > mode
	*Negative skew: mean < median < mode

	*Confidence interval: range in which real mean expected to fall
	*t test: compares means of 2 groups		*t test: compares means of 2 groups
	*~~ANOVA~~: ~~compares means of ≥ 3 groups~~		*Type I error: H0 incorrectly rejected
	*χ²: ~~≥ 2 percentages or proportions of categorical outcomes~~		*Type II error: H0 incorrectly accepted

	==Also See==		==Also See==

Heston at 20:51, 28 July 2016

2016-07-28T20:51:12Z

← Revisión anterior		Revisión del 20:51 28 jul 2016
Línea 2:		Línea 2:
	*null hypothesis: there is no relationship between two measured phenomena		*null hypothesis: there is no relationship between two measured phenomena
	**often denoted H0 (read “H-nought”, "H-null", or "H-zero")		**often denoted H0 (read “H-nought”, "H-null", or "H-zero")
			*alternative hypothesis: there is a significant relationship between the two measured phenomena
			**often denoted H1

	==Common Statistical Terms==		==Common Statistical Terms==

Arsmd: new section, hyperlinks

2015-01-04T21:50:37Z

new section, hyperlinks

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==Background==
*null hypothesis: there is no relationship between two measured phenomena
**often denoted H0 (read “H-nought”, "H-null", or "H-zero")

==Common Statistical Terms==
*Type I error: H0 incorrectly rejected
*Type II error: H0 incorrectly accepted
*α: probability of type I error
*β: probability of type II error
*Power: probability of correctly rejecting H0
*↑ power and ↓ β: ↑ sample size, ↑ expected effect size, ↑ precision of measurement

*Standard deviation: variability from mean
*Standard error of the mean: variability between sample mean and true mean
*Positive skew: mean > median > mode
*Negative skew: mean < median < mode

*Confidence interval: range in which real mean expected to fall
*t test: compares means of 2 groups
*ANOVA: compares means of ≥ 3 groups
*χ²: ≥ 2 percentages or proportions of categorical outcomes

==Also See==
*[[Types of Statistical Tests]]

[[Category:EBQ]]