Statistics Expected Value

The table shows the number or babies born on each day of the week.  Is there evidence that births are more likely on specific days of the week?

• yes, the p value is greater than .05

• no, the p value is less than .05

• yes, the p value is less than .05

• no, the p value is greater than .05

What are the expected counts of a female who likes Pepsi?

• 10.5

• 11

• 14.5

• 6.3

Find the degrees of freedom.

• 4

• 5

• 6

• 7

In the formula for Chi Sqare, the E stands for

• the sum

• the observed frequency

• The expected frequency

• the p value

A small store keeps track of the number X of customers that make a purchase during the first hour that the store is open each day. Based on the records, X has the following probability distribution. What is the average number of customers that the owner can expect to make a purchase in the first hour of opening?

• 0.2

• 1.4

• 2.0

• 3.0

• 31.7
• 34.1
• 63.4
• 68.2

Find the mean (expected value) of the probability distribution.

• 85

• 83.2

• 87.1

• 84.4

Data was compiled and the number of goals for a hockey team per game and the corresponding probabilities are given below. If this hockey team plays an 82-game season, what is the expected cumulative goal total for the next season?

• 220

• 239

• 261

• 309

• 320

Find the expected value. READ CAREFULLY!

• 4.5

• 25.5

• 3.825

• 6.52

Data was compiled and the number of goals for a hockey team per game and the corresponding probabilities are given below. If this hockey team plays an 82-game season, what is the expected cumulative goal total for the next season?

• 220

• 239

• 261

• 309

• 320