Probability Model Legitimate

Find the expected value, round to 3 decimal places.

• 0.4

• 0.6

• 0

• 1.1

Given the probability model in the table below, what is the expected value of the random variable?

• 12

• 4.67

• 14

• 7.5

Find the expected value

• 0.2

• 1.4

• 2.0

• 3.0

Find the expected value

• 1.9

• 0.3

• 2.1

• 3

Given the probability model in the table below, what is the expected value of the random variable?
  X        50          20        5
P(X)     0.1         0.3      0.6

• 14
• 4.67
• 5
• 7.5

Is your expected value always going to be what happens in real life?

• yes
• no

x 100 200 300 400

P(X=x) 0.1 0.7 0.1 0.1

Find the expected value.

• 220

• 230

• 150

• 250

x P(X=x)

0 0.7

1 0.2

2 0.1

Find the expected value

• 0.3

• 0.5

• 0.6

• 0.4

Number of storms 0 1 2 3

Probability 0.1 0.2 0.6 0.1

Find the expected value

• 1.4

• 1.6

• 1.8

• 2

X 0 1 2

P(X=x) 0.5 0.2 0.2

Find the expected value

• 0.4

• 0.6

• 0

• 1.1