IXL - Graph a discrete probability distribution (Precalculus practice)

The table below shows the probability distribution of a random variable

X	P ( X )
161	0.1
162	0.1
163	0.1
164	0.1
165	0.1
166	0.1
167	0.1
168	0.1
169	0.1
170	0.1

Complete the graph of the probability distribution of

161

162

163

164

165

166

167

168

169

170

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

(

)

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Learn with an example

question

The table below shows the probability distribution of a random variable

X	P ( X )
33	0.1
34	0.1
35	0.1
36	0.1
37	0.1
38	0.1
39	0.1
40	0.1
41	0.1
42	0.1

Complete the graph of the probability distribution of

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

(

)

key idea

A random variable is a function that assigns a numerical value to each outcome in a sample space. Note that though random variables are functions, they are usually denoted by letters like

is a random variable,

(

)

(

)

is the probability that

takes the value

The function that maps

(

)

is the probability distribution of

A probability distribution is frequently represented as an equation, table, or graph.

solution

For each missing value of

graph a bar with height

(

)

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

(

)

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Not feeling ready yet? These can help:

GG.6Create bar graphs

DD.3Write a discrete probability distribution

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