The Hypothesis

University:
University of Alberta
Course:
CMPUT 391 | Database Management Systems
Academic year:

2022
Views:

181

Pages:

2
Author:

Muthia M

Hypothesis Population A population includes all of the elements from a set of data. Sample Sample consists one or more observations drawn from the population. Step by Step Step by step create hypothesis: 1. Determine the hypothesis 2. Determine the value of alpha 3. Calculate test statistics 4. Conclusion Determine the Hypothesis Hypotheses are assumptions or statements about parameters. 1. Null Hypothesis (H0) Null Hypothesis (H0) is a hypothesis associated with a contradiction to a theory one would like to prove. 2. Alternative Hypothesis (H1) Alternative Hypothesis (H1) is a hypothesis (often composite) associated with a theory one would like to prove. Alpha Value A population includes all of the elements from a set of data. 1) Type I Error: α 2) Type II Error: β Type of Statistical Test 1. Parametric statistics are based on assumptions about the distribution of population from which the sample was taken. 2. Nonparametric statistics are not based on assumptions, that is, the data can collected from a sample that does not follow a specific distribution. Assumed distribution Assumed variance Parametric Normal Non-parametric Any Homogeneous Homogenous and Heterogeneous Parametric Vs Non-Parametric Analysis Type Example Parametric TestExample Compare mean between Do managers who are menTwo-sample T-Wilcoxon two independent groups have higher average salaries test Rank-sum than managers that are Test female? Compare two quantitative Examine students' Pair T-test Wilcoxon measurements taken from diagnostic test results Signed-rank the same individual before and after a unit of Test study Compare means between Is there a difference in cropAnalysis of Kruskalthree of more independent yield if a farmer uses Variance Wallis test groups fertilizer A, B, or C? (ANOVA)