Vocabulary
The entire group you want information about
What is population?
A teacher wants to know the favorite school lunch of all 7th graders. She surveys 10 students she randomly selects from the 7th grade roster. Is this sample likely to represent all 7th graders? Why or why not
What is Yes! The students were randomly selected.
A random sample of 20 students shows that 8 students have a pet dog. There are 100 students in the grade.
About how many students in the grade likely have a pet dog?
What is 40 students!
Two dot plots show the number of minutes students spend on homework each night.
Class A’s data is mostly between 20–40 minutes.
Class B’s data is mostly between 35–55 minutes.
Which class generally spends more time on homework, and how can you tell?
What is Class B, because most of its data has higher numbers than Class A.
A group of kids finds a mysterious girl with special powers. Strange things start happening in their small town.
What is Stranger Things?
A method of selecting where everyone has an equal chance of being chosen.
What is Random?
Out of 25 randomly selected students, 15 say they prefer pizza on Fridays. There are 200 students in the grade. About how many students in the grade would you predict prefer pizza?
What is 120?
In a random sample of 50 students, 35 say they prefer online homework over paper homework. There are 300 students in the school. Predict how many students in the school prefer online homework.
What is 210 students!
Two box plots show quiz scores for Class 1 and Class 2.
The median for Class 1 is 72.
The median for Class 2 is 78.
Which class performed better overall, and why?
What is class 2, because its median score is higher.
This animated movie is about two sisters. One of them has ice powers and sings “Let It Go.”
What is Frozen?
A reasonable guess based on data, not an exact answer
What is estimates?
The basketball coach surveys only players on the basketball team to estimate how many hours all students exercise each week. Is this sample biased? Why or why not?
What is yes! (Answers may vary)
A random sample of 40 students shows the average time spent on homework each night is 45 minutes. What can you infer about the average homework time for the entire grade?
What is, we can infer that the average homework time for the entire grade is about 45 minutes! The random sample represents the population.
Two dot plots show the number of books read by students in two classes.
Most of Class X’s data is between 2–6 books.
Most of Class Y’s data is between 4–9 books.
Which class tends to read more books? Explain your reasoning.
What is class Y, because most of its values are higher than class X.
In this movie, a group of superheroes must work together to stop a powerful villain named Thanos.
Avengers: Endgame
Avengers: Infinity War
Numbers or facts that are collected to help answer a question or solve a problem
What is Data?
A principal wants to know if students like a new school rule. She surveys every 10th student entering the building in the morning. Is this method random? Would it likely give a good estimate of the whole school? Explain.
What is yes! (Answers may vary)
A random sample shows that 60% of students support a new school rule. Can we say that exactly 60% of all students support the rule? Explain.
What is no! We can say about 60%, but it may not be exactly 60% because it is based on a sample and not the entire population
Two box plots show test scores for two groups of students.
Group A’s scores are mostly between 65–85.
Group B’s scores are mostly between 70–90.
What can you conclude about how the two groups performed?
What is Group B generally scored higher! (answers may vary)
In this movie series, kids compete in dangerous games controlled by a powerful government in a dystopian future. The main character is Katniss Everdeen.
What is Hunger Games?
A graph that shows data using dots above a number line
What is dot plot?
A school has 800 students. A random sample of 40 students shows that 12 students bring lunch from home. Estimate how many students in the whole school bring lunch from home. Show your reasoning.
What is 240!
A random sample of 80 students shows that 52 students eat breakfast every day. The school has 1,000 students.
Estimate how many students in the whole school eat breakfast every day. Show your reasoning.
What is 650 students!
Two dot plots show the number of hours students spend playing video games each week.
Group 1’s data is centered around 6 hours.
Group 2’s data is centered around 10 hours, and most of its values are higher than Group 1’s.
What conclusion can you draw about the two groups?
What is Group 2 generally spends more time playing video games because its data is centered at higher values.
A British animated series for preschoolers that follows the adventures of a playful young pig, her family, and friends as they explore everyday life and learn valuable lessons.
What is Peppa Pig?