Module 1

Question 1

what is a “population of interest”

Answer 1

the entire collection of individuals you are interested in (not the sample)

Question 2

what is a Parameter

Answer 2

a numerical summary that describes a characteristic of the population
(number that describes a population)

Question 3

what is a statistic

Answer 3

a numerical summary that describes a characteristic of the sample

Question 4

what are the 5 W’s and H

Answer 4

Who = who are you collecting data from
What = what characteristic/variable are you measuring
Why = what is the reason for collecting data?
When & Where = knowing when and where the data is collected files info about he context

How = how are you going to collect the data? how is the variable being measured?

Question 5

What is a Categorical (qual) variable and what are he two subgroups

Answer 5

A categorical variable is where you place the subject into one of several groups or categories

• Nominal & Ordinal

Question 6

what is the difference between a Nominal Category and a Ordinal Category

Answer 6

Nominal = the levels have no order
eg. what sport do you play (soccer, basketball, hockey, etc.)

Ordinal = the levels have an order
eg. what letter grade did you receive? ( A+ A A- B+ B B- C+ C…. etc. )

Question 7

What is Numerical (quant) variables and what are the two subgroups

Answer 7

measures a number amount in a subject (uses numbers instead of categories)

Discrete and Continuous

Question 8

what is the difference between a discrete variable and continuous variable

Answer 8

discrete can only date on distinctive values (1, 2, 3, 4, …) and continuous can make on any value given in an interval (1.2, 2, 3.3, 3.9, 4.1, 5….)