intro to stats

Question 1

statistical inference

Answer 1

builds models and generates hpotheses to test them

Question 2

statistical inference process

Answer 2

population -> sample -> sample stats -> estimated population parameter

Question 3

sample

Answer 3

represents population
-if you dont have acess to entire population, pull smaller groups that rep population

Question 4

population

Answer 4

what we are studying, have to tjink about who qualifies for it

Question 5

estimated population parameter

Answer 5

parameter comes form population/is population
-able to make conclusion and relate it back to population

Question 6

statistical inference is one step beyond

Answer 6

descriptive stats

Question 7

elements

Answer 7

entities on which data is collected

Question 8

example of elements

Answer 8

individuals

Question 9

variable

Answer 9

characteristics of interest for elements

Question 10

exampe of variable

Answer 10

income or marital status

Question 11

obersvation

Answer 11

set of measurements for particular element

Question 12

nominal

Answer 12

label of names (can be numeric or not)
-gender race birthplace

Question 13

ordinal

Answer 13

order of rankings is important
-excellent, good poor

Question 14

interval

Answer 14

fixed unit of measurement, differnet between 2 values
-temp or SAT scores

Question 15

ratio scal

Answer 15

have all properties of interval data and ratio values is meaningful (zero point is fixed)
-distance, height weight time