statistics and research design

Question 0

What is a Type 2 error?

Answer 0

False null hypothesis accepted

Question 1

What is a Type 1 error?

Answer 1

True null hypothesis rejected

Question 2

Ratio IQ Equation

Answer 2

IQ= (mental age)
___________ X 100
(Chronological age)

Question 3

Mental Age

Answer 3

IQ (chronological age)
___________________
100

Question 4

Deviation IQ

Answer 4

how well a person performed on an IQ test relative to same age peer

Question 5

Types of Validity

Answer 5

Content
Criterion
Construct
Predictive
Convergent

Question 6

Content Validity

Answer 6

(determined before test is administered)

items adequately sample skill or trait being measured

Question 7

Criterion Validity

Answer 7

how well can test predict future performance in specific field

Question 8

Construct Validity

Answer 8

performance is correlated with other items theory predicts it is related to

Question 9

Predictive Validity

Answer 9

Criterion

Question 10

Convergent Validity

Answer 10

Construct Validity

Question 11

Nominal data

Answer 11

Categorical (names)

Ex) Democrat/ Republican

Question 12

Ordinal Data

Answer 12

Ranks (order horses finish in races)

Question 13

Interval Data

Answer 13

Actual Numbers

Question 14

Ratio Data

Answer 14

True 0 Point

Question 15

Independent Variable

Answer 15

Variable whose effect is being studied

Question 16

Dependent Variable

Answer 16

Variable expected to change due to IV change

Question 17

Standard Deviation (SD)

Answer 17

’s - mean–> absolute value, square, add them all together, divide by # of #’s and find square root

average scatter away from mean/ square root of variance

Question 18

Variance

Answer 18

- mean, add absolute values, divide by # of #s

Standard Deviation squared

Question 19

T-Score

Answer 19

mean= 50, sd= 10

Question 20

z score

Answer 20

how many standard deviations above/ below the mean is your score

= your score- mean of distribution
______________________________
standard deviation

Question 21

What kind of data?

Answer 21

Amounts (numbers)- how many groups?
2: T-Test
More than 2: ANOVA

Categories: Chi-Square Test

Question 22

Tests can be interpreted ______

Answer 22

Norm-referenced testing

• –> assess individual’s performance in reference to others
  problem: population of test takers can change

Domain-referenced testing (criterion)

• –> assess what test taker knows about specific content domain
  ex) driver’s test