7th Grade 2/15

_________ is a sample in which each individual or object in the entire population has an equal chance of being selected.

• Biased Sample

• Population

• Random Sample

• Quartile

_______ is the entire group of objects or individuals considered for a survey.

• Sample
• Population
• Random Sample
• Quartile

A school surveys all 7th grade boys to determine what to sell in the school store.  This sample is _________.

• Biased
• Unbiased
• Representative
• Peanut butter cups

According to a random telephone survey of 200 adults, 75% of all working adults in the U.S. are satisfied with their current job. What is the population in this survey?

• 200 adults

• adults in the US

• 75% of adults

Eight of the 11 people on the TRE Train are carrying a briefcase. Based on this information, if there are 700 people on the train, then about how many do NOT have a briefcase.

*NOTE: enter your answers as a number ONLY.

On a youth soccer team 3 out of the 12 team members have played in previous years. Based on this information, if 150 kids are in the youth soccer league, then how many could be expected to have played the year before?

*NOTE: enter your answers as a number ONLY.

The table shows the results of a random survey taken at an amusement park in which they asked guests that had previously visited the park before, to name their favorite ride. Based upon the results of this survey, what inference can you make about the entire population of visitors at the amusement park that day?

• The Green Dragon is the least popular ride.

• The King Canyon was exactly twice as popular as the Monte Carlo.

• The Ellipse is the most popular ride, with more than half of those surveyed choosing it as their favorite ride.

• One-third as many people chose the Monte Carlo as chose The Green Dragon.

At Madison School, 48 students were randomly selected to represent the student body in a study about what they would prefer to see placed in the outdoor common area of the school. The results are shown in the table. Which statement does not represent the data collected?

• The school should place a sculpture in the common area.

• The fountain and pond are about equally popular with students.

• The students do not know what a Koi Fish is.

• Over half of the students surveyed prefer a sculpture.

A poll was taken of Hobby Middle School, 25 out of 30 students said they would prefer pizza on Friday’s. Out of 1200 students, what is a reasonable prediction of how many students would prefer pizza on Fridays?

• 100

• 1000

• 10

• 1

A group of people were asked about their favorite types of pants. Predict how many people out of 150 would say jeans are their favorite.

• 150

• 50

• 25

• 75