Module 1

Question 1

what are the three frequency distributions?

Answer 1

Frequency table
Grouped Frequency Table
Frequency Histogram

Question 2

What does a frequency table show?

Answer 2

● Shows exact count of each value

Question 3

What does a grouped frequency table show?

Answer 3

● Shows number of values within an interval of values

Question 4

What does a histogram show?

Answer 4

● Looks like a bar graph but indicates frequencies

Question 5

A normal curve is what 3 things?

Answer 5

Bell-shaped
Symmetrical
Unimodal

Question 6

What are the 3 steps in presenting data?

Answer 6

Organize
Choose Summary Statistic
Present in Table or Graph

Question 7

biased scale?

Answer 7

Using scale to skew
results

Question 8

Sneaky Sample

Answer 8

participants in a study who are preselected or self-selected.

Question 9

interpolation?

Answer 9

assuming value
between two points is
consistent

Question 10

Extrapolation?

Answer 10

Values beyond data
points will continue
indefinitely

Question 11

Inaccurate values?

Answer 11

Using scaling to
distort proportions

Question 12

central tendency?

Answer 12

Describe the center of a
dataset

Question 13

shape?

Answer 13

What does the
distribution of the data
look like?

Question 14

Variability?

Answer 14

Describe how varied the
data are

Question 15

What are the three types of descriptives?

Answer 15

central tendency
shape
variability

Question 16

mean

Answer 16

mathematical average

Question 17

median

Answer 17

middle score

Question 18

mode

Answer 18

the most frequent score

Question 19

measures of central tendency

Answer 19

mean
median
mode

Question 20

Range

Answer 20

HIGHEST SCORE
(Xmax)– LOWEST
SCORE (Xmin)

Question 21

IQR

Answer 21

Q75% - Q25%

Question 22

Variance

Answer 22

SD squared

Question 23

Kurtosis

Answer 23

MEASURE OF TAIL THICKNESS
COMPARED TO NORMAL
MESOKURTIC – NORMAL
LEPTOKURTIC - THICKER TAILS
PLATYKURTIC – THINNER TAILS

Question 24

Random sample

Answer 24

Ideal – every member of the population has an equal
chance of being selected
Rarely used in social science

Question 25

convenience sample

Answer 25

Most common – uses readily available participants
Ex: the Sona participant pool (college student
required research participation

Question 26

issues with convenience samples

Answer 26

Generalizability
volunteer self-selection

Question 27

probability

Answer 27

the expected relative
frequency of an outcome; the likelihood
of events

Question 28

models of probability

Answer 28

uniform - prior knowledge always
Non-uniform - no prior
non uniform - prior

Question 29

two complex probabilities

Answer 29

Joint Events Compound Events
Two or more events
occurring together
“And”
Combination of simple
events as “successful”
“Or”