Statistics Quiz

The dot plots show exam scores for 25 students.

Which exam has an outlier?

• Semester 1

• Semester 2

• both exams

• neither

What are the medians for the Semester 1 exam and the Semester 2 exam?

• 75 and 79.8

• 75 and 80

• 85 and 80

• 95 and 100

Which value is greater for the people who come in the daytime than for the people who come in the evening?

• range

• interquartile range

• median

• maximum

Which group has more people?

• Daytime people

• Evening people

• They have the same number.

• You cannot tell from the box plots.

The circle graph shows 1,260 tickets sold at a school concert.

How many tickets were sold to adults and seniors?

• 240 tickets

• 302 tickets

• 410 tickets

• 517 tickets

A sample is being chosen for a survey to find out how people feel about adding more stop signs near a school.

Which group would be least biased?

• randomly-chosen voters

• randomly-chosen drivers

• randomly-chosen students

• randomly-chosen teachers

The box plot shows a random sample of 200 people from a town of 47,000.

What is the interquartile range?

• 5 years

• 6 years

• 16 years

• 22 years

A random sample of 60 was taken from a shipment of 12,500 light bulbs. There were 2 defective bulbs in the sample.

How many defective bulbs would you expect in the entire shipment?

• 250 bulbs

• 417 bulbs

• 2,500 bulbs

• 4,167 bulbs

What is the difference in population between the most populous and least populous cities?

What percent of the people live in the city with the second least population?