Chapter 2: Organizing and Summarizing Data

Question 1

frequency distribution

Answer 1

table that lists each category of data and number of occurrences for each category of data

Question 2

relative frequency

Answer 2

proportion/percent of occurrences in a category to the whole sample; find by RF= frequency/sample size

Question 3

histogram

Answer 3

frequency distributon for quantitative data invilving ranges of rectangles showing frequencies or relative frequencies for each range

Question 4

stem-and-leaf plot

Answer 4

quantitative frequency distribution showing each number via the leaf (right-most digit) and stem (rest of number)

Question 5

dot plot

Answer 5

quantitative frequency distribution showing every data point as dots stacked upon each other for a particular range of values

Question 6

cumulative fequency

Answer 6

addition of values that come before the range and the range itself

Question 7

In what ways can graphs be misleading?

Answer 7

• inconsistent vertical and horizontal axes
• 3D misrepresentations
• unclear pictures
• etc

Question 8

pareto chart

Answer 8

chart showing bars sorted in order from largest to smallest

Question 9

time-series plot

Answer 9

line graph that shows a measurement changing over time

Question 10

cumulative relative frequency

Answer 10

relative frequency of a specific category plus total relative frequencies of previous categories

Question 11

symmetric distribution

Answer 11

bellshaped , same about the midline

Question 12

uniform distribution

Answer 12

approximately same value whole time

Question 13

skewed right

Answer 13

lowev values on right, tail is on the right

Question 14

skewed left

Answer 14

lower values are on the left, tail is to the left