Module 2: Frequency distributions

Question 1

Frequency distribution

Answer 1

table showing the frequency of various outcomes in a sample

Question 2

Normal distribution

Answer 2

-bell shaped curve
-symmetrically distributed data around mean

Question 3

Which example demonstrates the normal distribution visually

Answer 3

Galton board example (beads falling)

Question 4

Which example uses the 80/20 law (80% effects come from 20% cause)

Answer 4

Pareto Distribution

Question 5

What areas is the pareto distribution commonly used?

Answer 5

-creative fields, productivity, charitable donations ,artistic works, talent, wealth, and income

Question 6

Which test only works when the data is normally distributed with continuous values?

Answer 6

T-test

Question 7

Ordinal values

Answer 7

-represent ranked data

Question 8

Index values

Answer 8

-represent data points on continuous scale

Question 9

Bias

Answer 9

-unevenly weighs data (loaded dice)
-can cause a shift in data representation

Question 10

Confounding variability

Answer 10

-makes trends harder to detect (ie. sleep quality, nutritional status, outside stress, minor infections)