Terminology

Question 1

Entire group of people or data you want to understand

Answer 1

Population

Question 2

Subgroup of the whole

Answer 2

Sample

Question 3

Describes the data pertaining to a population or sample, specifically the center of the data, spread of the data, and shape of the plotted graph

Answer 3

Descriptive statistics

Question 4

Statistics where the researchers infer the features of a population from the data found in a sample

Answer 4

Inferential statistics

Question 5

Describes a population characteristic, particularly it’s mean and SD

Answer 5

Parameter

Question 6

Number that describes a sample characteristic such as the samples mean and SD

Answer 6

Statistic

Question 7

How to get around sampling error

Answer 7

Increase sample size

Question 8

Unbiased error caused by natural variability that does not precisely reflect the population avg

Answer 8

Sampling error

Question 9

Researcher has not selected the sample randomly, but with bias towards specific characteristics

Answer 9

Selection bias

Question 10

How close is the measure to the true measure

Answer 10

Validity

Question 11

Inaccurate measure

Answer 11

Invalid

Question 12

How repeatable the test is

Answer 12

Reliability

Question 13

Classic bell shaped curve

Answer 13

Normal or Gaussian distribution

Question 14

Statistical tests on data that follow a normal dist

Answer 14

Parametric test

Question 15

Term for tests that are not used for guassian or normal distribution

Answer 15

Nonparametric test

Question 16

Excessive leptokuritic curve

Answer 16

High peak at mean, positive kurtosis, data more heavily distributed around mean than a normal dist

Question 17

Excessively flat curves, negative kurtosis, because data are spread out and less concentrated around mean than normal dist

Answer 17

Platykurtic

Question 18

Measure if curve is excessively peaked or flat

Answer 18

Kurtosis

Question 19

Kurtosis for normal curve

Answer 19

Mesokurtic

Question 20

What is the skew and kurtosis of a normal curve?

At what values for skew and kurtosis can parametric tests be used?

Answer 20

0

Plus or minus 2

Question 21

How to calculate probability for two dependent variables (having both diseases) not mutually exclusive

Answer 21

Multiple the probabilities

Question 22

Way to calculate having one disease or another, mutually exclusive (cannot occur at same time)

Answer 22

Add probabilities