ap stats - chapter 2 vocab

Question 1

ogives

Answer 1

cumulative frequency graph

Question 2

cumulative frequency

Answer 2

adding something up as we go along

Question 3

relative cumulative frequency

Answer 3

adding something up as we go but turning them into percentages
#/total #

Question 4

relative

Answer 4

%

Question 5

normal distribution

Answer 5

a special density curve that is shaped like a bell

Question 6

normal distribution, aka

Answer 6

normal curve

Question 7

Mu

Answer 7

characterizes the POSITION of the normal distribution

Question 8

sigma

Answer 8

characterizes the SPREAD of the normal distribution

Question 9

total density of a curve =

Answer 9

1

Question 10

68-95-99.7 rule

Answer 10

remember this

Question 11

one standard deviation away contains an area of ___?

Answer 11

68%

Question 12

two standard deviations away contains an area of ___?

Answer 12

95%

Question 13

three standard deviations away contains an area of

Answer 13

99.7%

Question 14

standard normal distribution

Answer 14

special type of normal distribution that has a mean of 0 and a standard deviation of 1

Question 15

z-score

Answer 15

how many standard deviations an observation is away from the mean

Question 16

the tables show the total amount of area to the ___

Answer 16

LEFT side of any value of z

Question 17

if on the RIGHT side…

Answer 17

subtract found area with 1.0000

Question 18

equation:

Answer 18

z = #-Mu/sigma

Question 19

to find an standard distribution IN BETWEEN

Answer 19

subtract values

Question 20

to find an standard distribution LESS THAN(left)

Answer 20

just solve

Question 21

to find an standard distribution GREATER THAN(right)

Answer 21

subtract 1.0000 with value