QMS 202 Test 2: Hypothesis Testing and Statistical Analysis

Posted by on Feb 24, 2025 in Road Engineering Technology | 0 comments

QMS 202 Test 2: Statistical Analysis Crib Sheet

By: Eron Gjongecaj, Student nr: 50053246

Chapter 12: Comparing Means and Proportions

Topics: Comparing means of two related populations, comparing the proportions of two independent populations.

Comparing Means Between Two Related Populations: Paired T-Test

Paired t-test for the mean difference: Population needs to be normally distributed. If not, we can still use the paired t-test if the sample size is not very small.

  1. State the null and alternative hypotheses.
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Hypothesis Testing: Concepts, Steps, and Result Interpretation

Posted by on Feb 18, 2025 in Road Engineering Technology | 0 comments

Hypothesis Testing: Concepts, Steps, and Interpretation

Background:

  • A statistical hypothesis is an assumption about a population parameter. This assumption may or may not be true.
  • The best way to determine whether a statistical hypothesis is true would be to examine the entire population.

Since that is often impractical, researchers typically examine a random sample from the population.

If sample data are not consistent with the statistical hypothesis, the hypothesis is rejected.

The question of interest

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