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  1. Problems
  2. /Statistics Basics
  3. /Learning from Samples

Learning from Samples

Statistics & Data Science
+ Upload a Problem
More in Statistics BasicsData and SamplingTables and GraphsAverages: Mean, Median and ModeSpread of DataProbability and ChanceStudy Design and ExperimentsRandom Variables and DistributionsCorrelation and RegressionLearning from Samples
30 problems
Exam:
Type:
1.
A made-up street has 5 households. They keep 0, 1, 1, 3 and 5 pets… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from Samples, Data and SamplingStemPy LabStemPy Lab
Easy
2.
In a made-up town, 60% of the adults walk for at least half an hour every day… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from Samples, Data and SamplingStemPy LabStemPy Lab
Easy
3.
Six students in a made-up study group score 4, 6, 7, 9, 10 and 12 marks in a short quiz… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from Samples, Data and SamplingStemPy LabStemPy Lab
Medium
4.
A machine fills bags of rice. The masses of single bags have a standard deviation of 15 g… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from Samples, Data and SamplingStemPy LabStemPy Lab
Easy
5.
Three fair dice are thrown, and x is the mean of the three faces… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from Samples, Data and SamplingStemPy LabStemPy Lab
Medium
6.
A spinner shows 1, 2 or 6, each with the same chance… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from Samples, Data and SamplingStemPy LabStemPy Lab
Medium
7.
The times that patients wait at a made-up clinic have mean 50 minutes and standard deviation 12… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from Samples, Data and SamplingStemPy LabStemPy Lab
Hard
8.
A coin is fair, so the true share of heads is 0.5… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from Samples, Data and SamplingStemPy LabStemPy Lab
Easy
9.
A library expects that about 30% of the members of a large club read a newspaper every day… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from Samples, Data and SamplingStemPy LabStemPy Lab
Medium
10.
A researcher takes a random sample of 400 adults, without replacement, in a made-up town of 5000… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from Samples, Data and SamplingStemPy LabStemPy Lab
Hard
11.
A made-up poll asks 900 parents, chosen at random, whether they want school uniforms… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from SamplesStemPy LabStemPy Lab
Easy
12.
A news report says: "In a random poll, 45% of voters back the new road, with a margin of error of 4… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from SamplesStemPy LabStemPy Lab
Easy
13.
A report gives only a 95% interval for the share of shoppers who use a loyalty card: from 0.38 to… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from SamplesStemPy LabStemPy Lab
Medium
14.
A made-up survey asks 60 commuters, chosen at random, whether they ride an electric bike, and 4 say… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from SamplesStemPy LabStemPy Lab
Easy
15.
A gardener plants 600 seeds of a made-up variety, a random sample from a large batch, and 150 of… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from SamplesStemPy LabStemPy Lab
Medium
16.
A council plans a survey on a new bus route and wants a margin of error of at most 2 points with… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from SamplesStemPy LabStemPy Lab
Medium
17.
A charity runs a pilot survey of 200 households, chosen at random, and 60 of them say they would… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from SamplesStemPy LabStemPy Lab
Hard
18.
A made-up survey of 400 adults finds that a share of 0.62 recycle glass every week… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from SamplesStemPy LabStemPy Lab
Medium
19.
A made-up factory says that its bags of flour hold 500 g on average… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from SamplesStemPy LabStemPy Lab
Hard
20.
A research group publishes 20 separate 95% intervals over a year, each from its own independent… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from SamplesStemPy LabStemPy Lab
Hard
21.
A games club suspects that one of its dice shows a six too often… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from Samples, Probability and ChanceStemPy LabStemPy Lab
Easy
22.
A player suspects a die of showing too many sixes… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from Samples, Probability and ChanceStemPy LabStemPy Lab
Medium
23.
A student wants to know whether a spinner lands on red too often… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from Samples, Probability and ChanceStemPy LabStemPy Lab
Medium
24.
A coin is tossed 20 times and lands heads 16 times… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from Samples, Probability and ChanceStemPy LabStemPy Lab
Hard
25.
A coach splits 8 runners at random into two groups of 4… New
High School (9–10), High School (11–12), Undergraduate, General · Learning from Samples, Probability and ChanceStemPy LabStemPy Lab
Easy
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