Grade 7 · Math

7th grade Predict about a whole group from a sample worksheet

6 printable versionsBuilding Confidence10 questions · answer keyFree · no account

Level: Building Confidence · On Level · Challenge Me

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Predict about a whole group from a sample

Grade 7 Math Worksheet - Building Confidence

NameDate

Circle the best answer, or write your answer on the line.

Each dot is one student. Esme asked a random sample of 20 of the 300 students. One sneaker squeaked. Each dot in the sample stands for how many students in the whole group?
Ari asked a random sample of 20 of the 180 students. The bin stayed neat. Each dot in the sample stands for how many students in the whole group?
Luz asked a random sample of 25 of the 200 students. One kazoo was mentioned. Each dot in the sample stands for how many students in the whole group?
Each dot is one student. Each dot stands for 16 students in the whole group. Tala asked a random sample of 25 of the 400 students. A bell rang twice. About how many of the 400 students own a bike?
Pia asked a random sample of 40 of the 360 students. The swings kept swinging. About how many of the 360 students like the new playground?
Bo asked a random sample of 20 of the 320 students. The oranges stayed calm. About how many of the 320 students prefer apples to oranges?
Milo asked a random sample of 6 of the 90 students about books read this month. A bookmark was lost twice. About how many books in all would the 90 students have?
Zee asked a random sample of 6 of the 120 students about minutes of reading a night. The lamp stayed on. About how many minutes in all would the 120 students have?
Kira asked a random sample of 8 of the 150 students about cans collected for the food drive. One can rolled away. About how many cans in all would the 150 students have?
Ren asked a random sample of 6 of the 80 students about miles biked this week. A helmet wore a sticker. About how many miles in all would the 80 students have?

7th grade Predict about a whole group from a sample worksheet – printable — Print: 1 2 3 4 5 6

About this worksheet

Predict about a whole group from a sample. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

I can say how many students each dot of a sample stands for, and scale a yes count up to the whole group.
I can use a sample mean to predict a total for the whole group.
I can say why one prediction is not enough: different random samples give different numbers, so I give a range or say "about".

Standard: 7.SP.A.2

Words to know

random sample: Some members picked by chance, so they stand for the whole group.

prediction: A fair guess about the whole group, made from a sample.

yes stack: The dots in a sample that answered yes, piled in one column.

mean: The balance point: the total of the dots ÷ the number of dots.

each dot stands for: How many members of the whole group one sampled dot speaks for.

estimate: A number found from a sample that is close to, but not exactly, the real one.

vary: Change from one random sample to the next.

Common mistakes

Your child subtracted the group size and the sample size.

Your child multiplied the group size and the sample size.

Your child shared the group among the yes dots only.

What to say

Ask: if the sample is a small copy of the group, how many students does each sampled student stand for?

Ask: if every dot stands for the same number of students, do the dots times that number add up to the whole group?

Ask: does the no stack stand for students too?

Questions parents ask

What is the most common mistake with predict about a whole group from a sample?

Your child subtracted the group size and the sample size.

How can I help my child with predict about a whole group from a sample?

Ask: if the sample is a small copy of the group, how many students does each sampled student stand for?

Are these 7th grade math worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

More grade 7 math

See all grade 7 math

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