Estimate the mean exam score for the 50 students in Professor Axolotl's class.

Score	f
40 but less than 50	6
50 but less than 60	18
60 but less than 70	14
70 but less than 80	9
80 but less than 90	3
Total	50

Multiple Choice

• 59.2
• 62.0
• 63.5
• 64.1

Given the contingency table shown here, find the probability that a randomly chosen employee is a line worker who plans to retire at age 65. Survey question: Do you plan on retiring or keep working when you turn 65?

Employee	Retire (R)	Work (W)	Total
Management (M)	13	18	31
Line worker (L)	39	54	93
Total	52	72	124

Multiple Choice

• .227
• .419
• .750
• .315

Given the contingency table shown here, what is the probability that a participant selected at random is a graduate student who opposes the change to a quarter system?

Group Surveyed
Opinion:	Undergrads (U)	Graduates (G)	Faculty (F)	Row Total
Oppose Change (N)	73	27	20	120
Favor Change (S)	27	23	30	80
Col Total	100	50	50	200

Multiple Choice

• .135
• .250
• .375
• .540

Given the contingency table shown here, what is the probability that a student attends a public school in a rural area? What type of school do you attend?

Location	Public (P)	Religious (R)	Other Private (O)	Row Total
Inner City (I)	35	15	20	70
Suburban (S)	45	10	25	80
Rural (R)	25	5	5	35
Col Total	105	30	50	185

Multiple Choice

• .238
• .714
• .135
• .567

From the following tree, find the probability that a randomly chosen person will get the flu vaccine and will also get the flu.

Multiple Choice

• .10
• .07
• .19
• .70