Chapter 2

Question 1

continuous data

Answer 1

Can be measured
*has less then to and classes overlap

Question 1

Discrete data

Answer 1

countable values
*classes never overlap

Question 2

Cumulative relative frequency

Answer 2

total proportion of observations less then or equal to class you are looking at

Question 3

what is K and how do you calculate

Answer 3

The number of bins

find k by doing 2^k => number of points

Question 4

what is width and how do you calculate it

Answer 4

range of numbers to put into each class

(max data- min data)/k

*round to whole number

Question 5

What are the rules for group data classes

Answer 5

equal size classes: must be equal width
mutually exclusive: class boundaries shouldn’t overlap
Include all data points
avoid empty classes

Question 6

whats the ogive

Answer 6

line graph that plots relative freq
very steep slope at beginning or end means it squeed

Question 7

ways to display QUALITATIVE data

Answer 7

pareto charts
pie charts
contingency table
stem and leaf