From 9e822dc0d1c81c7b2f932d63795795fcb2731c7d Mon Sep 17 00:00:00 2001 From: zleyyij Date: Thu, 1 Feb 2024 14:24:19 -0700 Subject: [PATCH] vault backup: 2024-02-01 14:24:19 --- education/statistics/Hypothesis Tests.md | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/education/statistics/Hypothesis Tests.md b/education/statistics/Hypothesis Tests.md index bd5e49a..25b26d6 100644 --- a/education/statistics/Hypothesis Tests.md +++ b/education/statistics/Hypothesis Tests.md @@ -1,3 +1,4 @@ +(Ch 26, stat 1040) ## z tests for percentages This test can be used if: - The data is a simple random sample from the population of interest @@ -8,12 +9,12 @@ If an observed value is too many SEs away from the expected value, it is hard to ### Null Hypotheses | Term | Description | | ---- | ---- | -| Null Hypothesis | This is a statement about a *parameter* | +| Null Hypothesis | This is a statement about a *parameter*. It's a statement about equality. The chance of getting *x* is *y%*. | | Alternative/Research Hypothesis | What the researcher is out to prove, a statement of inequality. (Less than, greater than, not equal to). | | One-tailed test | Use when the alternative hypothesis says that the % of 1s is less than or greater than expected. It's one sided | | Two tailed test | When something is not equal to the expected. | ## P Value The chance of observing at least a sample statistic, or something more extreme, if the null hypothesis is true. -If the p-value is less than 5%, reject the null hypothesis. -If the p-value is greater than 5%, fail to reject the null hypothesis. +If the p-value is less than *5*%, reject the null hypothesis. +If the p-value is greater than *5*%, fail to reject the null hypothesis.