Semester 1 review

Suppose that 60% of students who take the AP Statistics exam score 4 or 5, 25% score 3, and the rest score 1 or 2. Suppose further that 95% of those scoring 4 or 5 receive college credit, 50% of those scoring 3 receive such credit, and 4% of those scoring 1 or 2 receive credit. If a student who is chosen at random from among those taking the exam receives college credit, what is the probability that she received a 3 on the exam?

• 0.125
• 0.178
• 0.701
• 0.813

Sixty-five percent of all divorce cases cite incompatibility as the underlying reason. If four couples file for divorce, what is the probability that exactly two will state incompatibility as the reason?

• 0.104
• 0.207
• 0.254
• 0.311

• 0

• 1

• 
• 
• 

What is the expected value of the number of cars in a randomly selected household?

• 2.5
• 0.167
• 1.45
• 1

Describe the histogram:

• Left Skewed
• Symmetrical
• Right Skewed
• Uniform

How many employees are there that make between $33,000 and $43,000

• 250
• 500
• 550
• 750

What is the median of the Stem-and-Leaf Plot?

• 43.5
• 42
• 45
• 44.5

33, 25, 42, 25, 31, 37, 46, 29, 38
What is the interquartile range of the data?

• 8
• 9
• 13
• 21

Which restaurant has a higher median wait time?

• Lucy's Steakhouse
• Gary's Grill
• They are the same

Using the information below, identify which of the following is NOT an outlier:
Q1 = 53
Q2 = 55
Q3=61

• 73
• 40
• 80
• 73.5