apstats 1.1 & 1.2

Question 1

individuals

Answer 1

people, animals, or things described by a set of data

Question 2

variable

Answer 2

any characteristic of an individual

Question 3

categorical variable

Answer 3

place an individual into one of several categories

Question 4

quantitative variable

Answer 4

takes numerical values for which it makes sense to find an average

Question 5

discrete

Answer 5

there are gaps in the numbers that are possible (whole #’s)

Question 6

continuous

Answer 6

no gaps in the numbers are possible (decimals)

Question 7

distribution of a variable

Answer 7

what values a variable takes and how often it takes these values

Question 8

inference

Answer 8

conclusion that goes beyond data at hand

Question 9

frequency table

Answer 9

displays the counts

Question 10

relative frequency table

Answer 10

displays the percentages

Question 11

pie chart

Answer 11

a pie whose “slices” are sized by the percentages for categories

Question 12

bar graphs

Answer 12

represents each category as a bar

Question 13

two way table

Answer 13

describes two categorical variables

Question 14

marginal distribution

Answer 14

the distribution of a categorical variable for one category of another variable

Question 15

segmented bar graph

Answer 15

bar divided into segments for the categories to show the distribution

Question 16

association

Answer 16

knowing one variable helps to predict the value of the other variable

Question 17

shape of data can be described as:

Answer 17

roughly symmetric, skewed to the right, skewed to the left, uniform, unimodal, bimodal, multimodal

Question 18

center of distribution can be described using

Answer 18

mean, median

Question 19

outliers

Answer 19

values that are unusually small or large relative to the rest of the data