Descriptions

Question 1

define inferance

Answer 1

learning from data using statistical tools

Question 2

What are the three classes of data which we can gather

Answer 2

catigorical
- ordinal: some increases decrease
- nominal
discreate
continuous
- graphical representation
- can be coursened (height to cm)

Question 3

define a parameter

Answer 3

Parameters denoted with lowercase greek letters
parameters - a numerical representation of a measure of interest in a population

Question 4

What are the symbols and definitions around a parameter

Answer 4

µ = mean of a pop

σ = sd of a pop

π = proportion of a population

Question 5

What is a random variable

Answer 5

represents the possible outcomes of a random phenomenon

Question 6

what is a statistic

Answer 6

numeric sumary of data

Question 6

What is an estimate and how is it related to parameters

Answer 6

n estimate is a guess based around a sample for a parameters value
X¯ stat + estimate = ^µ parameter

Question 6

define a ratio and proportion

Answer 6

ratio = a compairison of one variable against annother
proportion is one variable agaisnt a population

Question 6

when is it appropritate to use a score

Answer 6

When continuous data is challanging to exspress as a defined unit

Question 7

What are the three kinds of Censored data

Answer 7

right censored:
when the true value is higher than a known value
left censored:
when the true value is lower than a known value
interval censored:
when the true value is between two known values