Chapter 2 quiz

Question 1

Graphs of categorical data include

Answer 1

pie charts, bar charts, and Pareto charts

Question 2

Graphs of quantitative data include

Answer 2

histograms, relative frequency histograms, frequency polygon, Ogive, dot scale, compressed plot and steam-and leaf and scatter

Question 3

Pie charts degrees are found by

Answer 3

multiplying the categories decimal percentage y 360

Question 4

Bar charts

Answer 4

have gaps and categories are on x-axis and frequencies are on the y-axis

Question 5

Pareto chart

Answer 5

bar chart but the bars are organized in either descending or ascending order

Question 6

histogram

Answer 6

horizontal scale represents classes and vertical scale represents frequencies, BARS MUST TOUCH

Question 7

Frequency Polygon

Answer 7

one class width above and below the midpoint, start and end graph by touching 0 this uses line segments

Question 8

Relative frequency histogram

Answer 8

decimal frequencies on the x-axis to represent relative frequency percent mid points are still used for y-axis

Question 9

Ogive

Answer 9

line graph depicting cumulative frequencies uses mid points still on y-axis but cumulative frequencies for x starts one class with below but does not end one class width above t zero

Question 10

compressed scale

Answer 10

this is the squiggle line going form zero to whatever

Question 11

Steam-and -leaf

Answer 11

preserves raw data must have a key to tell what numbers represent

Question 12

dot plot

Answer 12

dots represent the same value that they are stacked on ; preserve original data values.

Question 13

scatter plots

Answer 13

a plot of the paired data to measure the correlation or association between two quantitiative variables ; Positive pater both go up ; random = no association ; negative go down; closer the points are the stronger it is

Question 14

an unimodled histogram has one apparent peak

Answer 14

one bar is the highest above all the rests

Question 15

bimodal

Answer 15

two apparent peaks

Question 16

when all peaks appear the same height

Answer 16

it is uniform

Question 17

skewed right

Answer 17

if bars are the lowest on the right side and biggest going left

Question 18

skewed left

Answer 18

smallest amounts on bars are on the left larger are on the right

Question 19

symmetric distribution

Answer 19

could fold the histogram on the dotted line edges match pretty closely

Question 20

first class boundary

Answer 20

=2.5 -.5 = 1.5