Flashcards in eM1 – Principles of hypothesis testing Deck (12)

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1

## What is a research question?

### Provides the frame for which every component of a research project refers back to - everything read experimented and discussed must link back to it

2

## What is a hypothesis?

### A prediction of what the answer to a research question may be

3

## How do we test the validity of a hypothesis

### Carefully chosen statistical tests

4

## What is a null hypothesis?

### A prediction that there is no dependant relationship between two variables

5

## What is an alternative hypothesis?

### A prediction that there is a specific and reproducible (dependant) relationship between variables

6

## Why in clinical practice would you prefer a non directional hypothesis?

### In case you miss an effect from what you're testing

7

## What is important to remember about testing the validity of null hypotheses?

### Can only reject or fail to reject chosen null hypothesis- answer is most likely correct but isn't 100% conclusive

8

## What is a p-value?

### The likelihood that the observed difference was observed by chance

9

## What is the significance of a p-value?

### Calculates the probability that the observed results are real - the probability of the results of the study reflecting what would be observed in the population.

10

## What is the alpha (a)-value?

### The probability of rejecting the null hypothesis when it's true.

11

## At what a-value do most consider the p-value to show a significant difference?

### p ≤ a = 0.05

12