Exercise
Form 3: Sample Size and Inference Precision
Examine how sample size influences the precision of statistical inferences. Learn how larger sample sizes impact the reliability of estimates.
Questions
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MultiChoice
How does increasing the sample size affect the reliability of inferences about a population?
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MultiChoice
Which sample size will likely give the most accurate estimate of the mean height of 7th graders?
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MultiChoice
Why is a random sample of 100 students better than a random sample of 10 students for predicting school-wide preferences?
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MultiChoice
What term describes the natural variation found among different random samples drawn from the same population?
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MultiChoice
A town has 5,000 residents. Which random sample size provides the narrowest margin of error?
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MultiChoice
A survey of 5 random students finds that 80% prefer reading. Why might this estimate be unreliable for the whole school?
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MultiChoice
As sample size increases, what happens to the spread (variability) of sample means around the true population mean?
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MultiChoice
Which random sample size gives the most trustworthy prediction for a mayor's election outcome?
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MultiChoice
Which statement correctly compares sample size and sample representative character?
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MultiChoice
Which sample size would produce results closest to the true population parameter in repeated sampling?
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MultiChoice
If two separate random samples of 50 students are taken from the same school, what should you expect about their sample means?
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MultiChoice
How can a researcher increase confidence in a sample estimate without changing the population?