SF7 Chapter 10 Quiz

Based on the circle graph, how much money was spent on Groceries in July if the Total monthly budget was $1,500?

• $140

• $210

• $280

• $1,290

Based on the circle graph, how much more money was spent on their house then on their car in July if the Total monthly budget was $1,500?

• $150

• $225

• $300

• $525

Find the mean age of these quarterbacks.

• 23

• 24

• 25

• 26

Find the median and mode from these quarterbacks' ages.

• Median 24, Mode 22

• Median 24, Mode 24

• Median 25, Mode 22

• Median 25, Mode 24

Which of the following could be misleading when used to describe the average age of a quarterback in the NFL?

• Mean

• Median

• Mode

85% of the students surveyed plan to go on the field trip. If there are 680 students, predict how many total students will attend the field trip.

• 102

• 550

• 578

• 595

A survey of the soccer showed that 6 out of 8 players were interested in buying a sweatshirt. Predict how many kids out of the 44 members of the team would want to buy a sweatshirt.

• 30

• 33

• 36

• 38

Determine whether the conclusion is valid. Justify your answer.

The nurse has asked every 5th student that arrives at school and determines that about 80% of the students floss every day.

• Yes - This is an unbiased, systematic random sample

• Yes - This is an unbiased, simple random sample

• No - This is a biased, convenience sample

• No - This is a biased, voluntary response sample

Determine whether the conclusion is valid. Justify your answer.

John wants to know if people think he is funny. He asks his best friends at his lunch table and determines that he is indeed funny.

• Yes - This is an unbiased, systematic random sample

• Yes - This is an unbiased, simple random sample

• No - This is a biased, convenience sample

• No - This is a biased, voluntary response sample

Determine whether the conclusion is valid. Justify your answer.

The school is considering instituting a dress code. They send an e-mail home to parents asking them to fill out a survey and send it back with their opinions. They get a lot of positive responses and plan to begin the dress code immediately.

• Yes - This is an unbiased, systematic random sample

• Yes - This is an unbiased, simple random sample

• No - This is a biased, convenience sample

• No - This is a biased, voluntary response sample