Week 10 Flashcards
The strength of correlation used in Cohen’s rule of thumb is>
0 - No correlation
- 1 - Weak
- 3 - Medium
- 5 - Strong
What p value is used as the criteria to determine support for the null hypothesis
When p is less than 0.05
When is the null and alternative hypothesis supported
No effect was observed
And when an effect was observed
A large N is likely to
Decrease the margin of error in your estimates
When using inferential statistics what is the aim?
Measure a sample to understand the population
Define a sample population
A selection or a subset of individuals from a statistical population
When are interquartile and semi-interquartile ranges used
The measures of variance when the median has been selected as the central tendency (when the data is skewed)
Define the measures of central tendency
Mean, Median and Mode
Define the prevalence rate
Number of existing cases divided by the total population at risk
What is the incidence rate
The number of new cases divided by the total population at risk of developing the disorder
How to u find proportion
Divide the say SA doctors by total doctors
