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by BlastRoom
Use random samples to estimate populations and describe sample variability.
#us_grade_7_math
20 questions
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
Answer to place stones and capture territory.
Outrun the snow together.
Earn blasts, then hunt the other team.
Answer to earn energy, then climb.
The class blasts through walls together.
Bid on mystery lots. Most money wins.
Sell tours. Nice, standard, or a total scam.
Answer, restock, and serve the rush.
More correct answers pulls the rope your way.
Answer, then shoot down the alien wave.
Answer, then tap to leap the frozen ridge.
In a random sample of 45 students, 15 bike to school. The school has 900 students. About how many students bike to school?
A random sample of 80 households finds 20 compost food scraps. The town has 2,400 households. About how many households compost food scraps?
In a random sample of 50 cans, 6 are dented. A shipment has 1,200 cans. About how many cans in the shipment are dented?
A librarian checks a random sample of 35 books and finds 7 mysteries. The library has 2,100 books. About how many are mysteries?
A random sample of 60 club members shows 18 prefer soccer. The club has 500 members. About how many members prefer soccer?
A ranger samples 25 trees at random and finds 4 with beetle damage. The forest has 3,750 trees. About how many trees have beetle damage?
A random sample of 100 concertgoers finds 60 buy snacks. If 750 people attend, about how many people buy snacks?
In a random sample of 40 yearbook pages, 12 have photos. The yearbook has 300 pages. About how many pages have photos?
A random sample of 75 students finds 9 are in band. The school has 1,250 students. About how many students are in band?
At camp, 10 of 32 randomly sampled backpacks contain water bottles. There are 640 campers. About how many campers have water bottles?
Three random samples estimate that 38%, 42%, and 47% of 600 students want a later start. What inference fits the samples?
Four random samples find mean daily screen times of 1.8, 2.1, 2, and 2.3 hours. What conclusion is reasonable?
Random samples of 40 park visitors find 22, 18, and 20 recycle. How should the park describe visitor recycling?
Three random samples estimate 58%, 61%, and 64% of families own pets. What is the best population inference?
Random samples of packages have mean masses of 1.9 kg, 2 kg, and 2.2 kg. What estimate describes the population?
Random samples estimate 28%, 31%, and 35% of 500 club members will attend a fundraiser. What statement accounts for variability?
Two random samples of 50 students found mean homework times of 42 and 46 minutes. For 400 students, what total is reasonable?
Random samples estimate 25%, 30%, and 35% of residents support a pool. The town has 2,000 residents. What range is reasonable?
Two random samples of 40 library books find 5 and 7 damaged books. The library has 1,600 books. What estimate is cautious?
Random samples of shoppers show mean spending of $18, $21, and $20. For 900 shoppers, what total sales estimate is reasonable?
Crack the passcode before the zombies get in.
Answer, then swat bugs for bonus points.
Race through questions at your own speed.
Same question on every screen. Fastest wins.
Pick a tile, answer, hit bonuses and steals.
Mean, Median, Range, IQR and MAD
40 questions
