9.12 EBDM Basic Statistics Flashcards Preview

Foundations Exam 3 > 9.12 EBDM Basic Statistics > Flashcards

Flashcards in 9.12 EBDM Basic Statistics Deck (31):
1

Measure that pertains to the population, almost always unobservable. Characteristic of a population. Describes the entire population

parameter

2

Characteristic of a sample (measure based on a sample). We can use this to estimate a population parameter.

statistic

3

if there is a skew and the peak is to the right and the tail is to the left, it is a _____ skew

left

4

if there is a skew and the peak is to the left and the tail is to the right, it is a _____ skew

right

5

mean, median, and mode are measures of _______

location

6

range, inter-quartile range, variance, standard deviation are measures of ________

dispersion

7

how far the values are away from the mean. A larger _____ means more uncertainty

variance

8

square root of variance is _____

SD

9

repeated measurements give the same/similar results. is this reliability or validity?

reliability

10

when a tool measures what it is supposed to, the "truth" it is ______.

valid
concept of validity

11

what is Intra-rater reliability

measure once by one person, measure again by same person and it is around the same

12

what is inter-rater reliability?

measure once by one person, measure again by another person - same/similar results

13

temporal reproducibility:

measure today, measure tomorrow, same/similar results

14

do reliable results mean the data is valid?

no

15

does a measure have to be reliable to be valid?

yes

16

there are two TYPES of measurement: what are they?

categorical and continuous

17

there are four LEVELS of measurement, what are they?

nominal, ordinal, interval, ratio

18

a nominal level of measurement is ________ (categorical or continuous?). What does it measure?

categorical
measures categories that have no order (occupation, gender, eye color, blood type)

19

an ordinal level of measurement is _______ (categorical or continuous?). What does it measure?

categorical
measures categories that have an order/direction (pain - poor, excellent, OK.... size small, medium, large)

20

an interval level of measurement is _______ (categorical or continuous?) what does it measure?

either categorical or continuous
data on a scale with an arbitrary 0 point and quantitative differences between two measurements (temperature, etc)

21

in interval levels of measurement, is a ratio meaningful? is a range?

a ratio is NOT meaningful and a range is.

22

a ratio level of measurement is _________ (categorical or continuous?) what does it measure?

either categorical or continuous.
measures something with a true/absolute zero point where ratio between two is meaningful (blood pressure, weight, cholesterol)

23

what level of measurement would you use for something that you think of as "twice as much, three times as much"

ratio level of measurement

24

on a scatterplot, you can see _______ between two variables

correlation

25

the LINEAR relationship between two variables on a scatterplot is called what?

the correlation coefficient

26

what are the two extremes of the correlation coefficient for a scatterplot?

-1 to 1

27

if there is no significant correlation coefficient for a scatterplot does that mean there is no correlation?

NO, it could be a non-linear correlation

28

___________ is the technique to study if a dependent variable changes with an independent variable

regression

29

linear regression analysis can _______ dependent variable using the independent variable

predict

30

in ____________ analysis, one postulates the statistical model that two variables, X and Y are related by a straight line

linear regression

31

the best fitting line between the points assuming two variables are linearly related

regression line