AP stats final

A survey should always be ____ and ____.

• random and biased
• random and unbiased

At an assembly 7 out of 10 students who entered the gym were carrying a backpack. Based on this information, if 700 students were at the assembly, how many students could be expected to be carrying a backpack?

• 49

• 490

• 210

• 421

Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?

• thirty students who are often tardy
• thirty students who are rarely tardy
• thirty of her friends
• thirty randomly selected students from her school

A sample should be

• representative of  only middle school students only
• a very large group
• representative of the population
• representative of people who volunteer

A radio station asks its listeners to dial one of two numbers to indicate their preference for one of two candidates in an upcoming election. Of the responses received, 76% favored candidate A. If there are 1,500 registered voters, how many will vote for candidate A?

• 1,140

• 6

• 1,974

• 100

What is the minimum value?

• 64
• 58
• 66
• 60

What is the maximum value?

• 58
• 66
• 64
• 60

What data value is the upper quartile (Q3)?

• 64
• 62
• 66
• 58

What is the median?

• 62
• 58
• 66
• 60

What is the median of the following data set?

25, 42, 36, 12, 19

• 36

• 25

• 39

• 26.5