Making Inferences from Data

The box-and-whisker plots show the points scored in each Super Bowl by the AFC and NFC. About how many points greater is the interquartile range for the NFC than the AFC?

• about 20

• about 25

• about 35

• about 10

A survey found that 5 out of 7 students drink soft drinks daily. If there are 420 students in a school, what is a reasonable prediction for the number of students drink soft drinks daily?

• 630 students

• 418 students

• 300 students

• 60 students

Antwan worked for 10 weeks at a summer job.  For each of the first 9 weeks, his mean earning was $250 per week.  In the last week, he earned $500 because he received a bonus.  How did the bonus affect his mean salary?

• increased by $25

• increased by  $250

• decreased by $250

• decreased by $25

• the shape is skewed to the right
• the shape is symmetric
• the shape is skewed to the left
• 75% of the data is between 1-8

What is the difference in the IQRs?

• 1

• 2

• 3

• 4

• None of the above

Which club has the smaller spread?

• Cruisers

• Car Hops

• Both have same spread

• The variability are the same

50% of the Car Hops went to 11 or fewer car shows.  True or False?

• True

• False

75% of the Cruisers went to more than 13 car shows.  True or False?

• True

• False

Describe the histogram:

• Left Skewed

• Symmetrical

• Right Skewed

• Uniform

• neither plot has an outlier
• Hayes Road is skewed right
• Jefferson Road's spread is less than Hayes Road's spread
• Hayes Road's center is at 55