Here are the correct answers for your statistics and probability worksheet. I have worked through each question to find the best sample population.
1. Which population would be good to survey to determine 5th grader's favorite books?
To get an accurate answer, you need a sample that represents all 5th graders, not just one class or a specific group of friends. Surveying students from every 5th-grade class ensures you get opinions from everyone.
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Correct Choice: B
2. Which population would be good to survey to determine how students get to school?
A larger sample size usually gives better data than a small one because it reduces the chance of random errors. Out of the options provided, 80 is the largest number, making it the most reliable sample.
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Correct Choice: D
3. Which population would be good to survey to determine kids' favorite things to play at the park?
Similar to the previous question, a larger group provides more accurate results. Surveying 500 children gives a much better idea of what "kids" in general like compared to surveying only 5 or 15.
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Correct Choice: B
4. A TV company is trying to decide whether to cancel a show. Which sample would be random?
A random sample means picking people without a specific pattern or bias.
* Options A, B, and C are biased because they only pick fans, non-watchers, or subscribers.
* Option D picks adults shopping in a store, which is a general group not specifically tied to the TV show, making it a random sample of potential viewers.
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Correct Choice: D
5. A teacher wants to know how to reward her students. Which sample would be random?
* Option A is biased toward fast workers.
* Option B is biased by alphabetical order (last names).
* Option C is biased toward past performance.
* Option D selects students based on where they are at a specific moment (recess), which is unrelated to their academic ability or speed, making it the most random choice among the options.
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Correct Choice: D
Final Answer:
1. B
2. D
3. B
4. D
5. D
Parent Tip: Review the logic above to help your child master the concept of population worksheet.
