Finding Values in the Probability Distribution Formula

Identify the value that should be placed in the question mark. Note: Remember your answer in each item so that you can use your time wisely.

• 0.3

• 0.4

• 0.5

• 0.6

Identify the value that should be placed in the question mark. Note: Remember your answer in each item so that you can use your time wisely.

• 0.2

• 0

• 0.3

• 0.1

Identify the value that should be placed in the question mark. Note: Remember your answer in each item so that you can use your time wisely.

• 0.3

• 0.4

• 0.5

• 0.6

Identify the value that should be placed in the question mark. Note: Remember your answer in each item so that you can use your time wisely.

• 0.3

• 0.4

• 0.5

• 0.6

• Yes, because all of the probabilities are between 0 and 1 inclusive and the sum of all the probabilities is 1.
• No, all probabilities are not be between 0 and 1 inclusive
• No, the sum of all the probabilities is not 1.
• Yes, because the distribution is symmetric

What E(x) for probability distribution given in the image?

• 2.4

• .103

• -1.03

• 1.03

• Yes, because all of the probabilities are between 0 and 1 inclusive and the sum of all the probabilities is 1.
• No, all probabilities are not be between 0 and 1 inclusive
• No, the sum of all the probabilities is not 1.
• Yes, because the distribution is symmetric

• $2.50

• $5

• -$2.50

• $0

A stockbroker estimates that at the end of the year, there is a 40% chance a stock will be worth $50, a 35% chance it will be worth $60 and a 25% chance it will be worth $70.
What expected value does this broker assign to this stock's end-of-the-year price?

• $58.50

• $60.00

• $62.50

• $65.00

• -$2.50

• -$3.33

• $0

• $5