Week 9

Question 1

What is Qualitative Data

Answer 1

Data that is represented as words or catergories
- Color, smell, blood type

Question 2

What is Quantitative Data

Answer 2

Numeric data
- Height, Weight, Points Scored, Dollars Earned

Question 3

What are the two types of quantitative data and describe them

Answer 3

• Discrete data (It’s only a finite amount of data ex: rolling a dice)
• Continuous data (Infinite amount of possible values)

Question 4

What is the population in a set

Answer 4

It’s the total set of observations.
ex: If studying obesity in men. the population would be the set of weights of all men in the world

Question 5

What is a sample

Answer 5

Subset of the study population

Question 6

What are bin “Indicators” and what do they represent

Answer 6

( Means not including
[ Means including

Question 7

What is the mean in a dataset

Answer 7

It’s the average of the dataset

Question 8

What is the median of a dataset

Answer 8

It’s the midpoint of the distribution of a sorted dataset

Question 9

What is the mode of a dataset?

Answer 9

It’s the most repeating value in the dataset

Question 10

What is the geometric mean of a dataset

Answer 10

Nth root of a product of n numbers

Question 11

How do you calculate the percentile of a dataset

Answer 11

Assume you are looking for k percentile on a dataset of size N
Calculate the rank of the percentile with (k/100) * (N +1)
If n is not a whole number, round up and take the data point found at n
If n is a whole number, take the n and n+1 points and average