Grade 7 Math · Sampling and Statistical Inference
Build Grade 7 Math skills with five 10-question practice tests on populations, samples, sampling methods, bias, data summaries, variability, and statistical inferences.
These Grade 7 Math practice tests help students use samples to learn about larger populations. Students identify populations and samples, compare sampling methods, recognize bias, summarize data, and make reasonable inferences.
A population is the full group a study is about, while a sample is the smaller group from which data are collected. A representative random sample can be used to estimate a population, but sample statistics may vary from one sample to another. Check the sampling method and the data summary before making an inference.
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3. Test
A 10-question Grade 7 Math practice test on populations, samples, sampling methods, bias, statistics, variability, and making inferences from data.
Identify the population and sample, recognize bias, calculate or interpret data summaries, and make conclusions supported by representative samples.
Please select an answer first.
Correct answer: A
The correct answer is .
The sum is , and .
Please select an answer first.
Correct answer: B
The correct answer is .
There are six values, so the median is the mean of the middle two: .
Please select an answer first.
Correct answer: C
The correct answer is .
The mode is the value that occurs most often. The value appears three times.
Please select an answer first.
Correct answer: D
The correct answer is .
Range equals the maximum minus the minimum: .
Please select an answer first.
Correct answer: A
The correct answer is .
The lower half has median and the upper half has median ; the IQR is .
Please select an answer first.
Correct answer: B
The correct answer is The mean.
The mean uses every value in the calculation, so an extreme value can pull it toward the outlier.
Please select an answer first.
Correct answer: C
The correct answer is .
Mean equals total divided by number of values, so total equals .
Please select an answer first.
Correct answer: D
The correct answer is About half the data values are at or below 18 and about half are at or above 18.
The median is the middle of an ordered data set, so it divides the data into two halves.
Please select an answer first.
Correct answer: A
The correct answer is The median and interquartile range.
The median and IQR are resistant to extreme values and better describe a strongly skewed distribution.
Please select an answer first.
Correct answer: B
The correct answer is The mean increases by 5.
Adding 5 to every data value adds 5 to the mean as well.
A population is the complete group being studied. A sample is a smaller group selected from that population to provide data.
Random selection gives population members a fair chance of being included and makes the sample more likely to represent the population.
The page includes five mini tests with 10 questions each, for 50 Grade 7 Sampling and Statistical Inference questions in total.
