Research And Design
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What is a correlation coefficient?
 It is a relationship that exists between two variables.
 Describes the strength and direction of the two variables.

What is the Spearmans RHOS?
Used with nonparametric data
 The Spearman procedure examines the difference between the two sets of
 rankings for each participant.
 The rs calculated value is given with a
 corresponding p value.

What are the five levels of evidence?
 1. Systematic review
 2. RCT
 3. quais expriemental, prepost, cohort, case control
 4. Correlational studies of multiple sites
 5. correlational studies, descriptive studies, qualitative studies, experiemental.

What are the Two types of Descriptve Research?
 Univariate: A single variable
 Co variate: relationships between Variables

_{WHAT IS PROBABILITY SAMPLING?
}
Simple random sampling
 Unbiased, use table of random
 numbers, participants are labelled
 lRandom drawing of numbers from a
 hat.
2. Systematic sampling
 l1:10 beginning from a random
 position on a selected named list. E.g. Every 10th person on a list. Starting
 point is random. Similar to random sampling if no order to the listing.