Flashcards in Review questions for test 2 Deck (31):

1

## Two types of Criterion Validity?

### Predictive and concurrent are two types of?

2

## Of all the types, this type of validity is the only one that has subcategories?

### Criterion validity is the only type to have?

3

## Can a tool be reliable without being valid?

### Yes

4

## Can a tool be valid without being reliable

### no

5

## Measures what you're looking for is defined as sensitive or specific?

### sensitive

6

## quota sampling is similar to random sampling except?

### in quota sampling you don't RANDOMLY select, you CONVENIENTLY select

7

## difference between population and sample

### population is the whole group and the sample is the part of the group that represents the population

8

## difference between sampling bias and sampling error

### sampling error results from the sampling bias

9

## types of probability sampling

### stratified, simple, cluster, systematic

10

## two groups in a study, what's the minimum number you need in each group

### 30

11

## Assurance that you are correct in rejecting the null hypothesis is called?

### statistical power

12

## three elements in determining the most appropriate sample size

### alpha, effect size, desired power level

13

## What is a sampling plan

### How you're going to collect your people, your inclusion and exclusion criteria

14

## what conditions must be met to use probability sampling

### list of people, number them, random sampling

15

## difference between simple random sampling and convenience sampling

### Convenience sampling is getting people who are conveniently there, who are willing to participate. Random has a wider scope, and since it's random, there's less chance of bias

16

## Choice between simple random sampling and convenience sampling, which one should you go with?

### Simple, because it's unbiased

17

## Rule of thumb for sample size?

### 30 per group

18

## With statistical power, the greater the power the more...?

### The more applicable the results

19

## Name 5 pieces of information require for informed consent

### Risk and benefits, alternative treatments (if there are any), what they're agreeing to do, the purpose of the study, consent

20

## name 3 vulnerable groups

### kids, elderly, pregnant

21

## difference between highest and lowest number

### range

22

## greek symbols always mean we're talking about population....?

### Population parameters

23

## If P is less than Alpha....?

### Reject the null hypothesis

24

## what does the null hypothesis say?

### there is no releationship

25

## If p is less than alpha, and you reject the null hypothesis...then?

### There is a relationship, therefore the treatment that was given had an impact

26

## wide confidence interval = _____ confidence

### less confidence

27

## narrow confidence interval= ______confidence

### more confidence

28

## test comparing two groups, looking for differences in means

### t-test

29

## Looking for differences in means between more than two groups

### ANOVA

30

## Found in RCTs an other studies that focus on treatment outcomes or illness predictions

### Biostatistics

31