Review questions for test 2

Question 1

Two types of Criterion Validity?

Answer 1

Predictive and concurrent are two types of?

Question 2

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

Answer 2

Criterion validity is the only type to have?

Question 3

Can a tool be reliable without being valid?

Answer 3

Yes

Question 4

Can a tool be valid without being reliable

Answer 4

no

Question 5

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

Answer 5

sensitive

Question 6

quota sampling is similar to random sampling except?

Answer 6

in quota sampling you don’t RANDOMLY select, you CONVENIENTLY select

Question 7

difference between population and sample

Answer 7

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

Question 8

difference between sampling bias and sampling error

Answer 8

sampling error results from the sampling bias

Question 9

types of probability sampling

Answer 9

stratified, simple, cluster, systematic

Question 10

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

Answer 10

30

Question 11

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

Answer 11

statistical power

Question 12

three elements in determining the most appropriate sample size

Answer 12

alpha, effect size, desired power level

Question 13

What is a sampling plan

Answer 13

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

Question 14

what conditions must be met to use probability sampling

Answer 14

list of people, number them, random sampling

Question 15

difference between simple random sampling and convenience sampling

Answer 15

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

Question 16

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

Answer 16

Simple, because it’s unbiased

Question 17

Rule of thumb for sample size?

Answer 17

30 per group

Question 18

With statistical power, the greater the power the more…?

Answer 18

The more applicable the results

Question 19

Name 5 pieces of information require for informed consent

Answer 19

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

Question 20

name 3 vulnerable groups

Answer 20

kids, elderly, pregnant

Question 21

difference between highest and lowest number

Answer 21

range

Question 22

greek symbols always mean we’re talking about population….?

Answer 22

Population parameters

Question 23

If P is less than Alpha….?

Answer 23

Reject the null hypothesis

Question 24

what does the null hypothesis say?

Answer 24

there is no releationship

Question 25

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

Answer 25

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

Question 26

wide confidence interval = _____ confidence

Answer 26

less confidence

Question 27

narrow confidence interval= ______confidence

Answer 27

more confidence

Question 28

test comparing two groups, looking for differences in means

Answer 28

t-test

Question 29

Looking for differences in means between more than two groups

Answer 29

ANOVA

Question 30

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

Answer 30

Biostatistics

Question 31

The degree of the difference or lack of difference between the groups in the study

Answer 31

magnitude of effect