Exercise
Form 4: Estimating Population Means
Practice using sample data to estimate the mean of an entire population. Apply mathematical methods to generate reasonable population estimates.
Questions
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MultiChoice
A random sample of 30 students has a mean study time of 8 hours per week. What is the best estimate for the mean study time of all students?
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MultiChoice
In a random sample of 40 commuters, the average wait time for the bus was 15 minutes. What is the point estimate for the population mean wait time?
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MultiChoice
A random sample of 5 students recorded their quiz scores: 12, 14, 15, 13, 16. What is the sample mean to estimate the class average?
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MultiChoice
A random sample of 25 middle schoolers sent an average of 45 text messages per day. What is the best estimate for the average per student in the school?
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MultiChoice
Four random samples yield sample means of $22, $26, $24, and $28. What is the best overall estimate for the population mean spending?
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MultiChoice
A random sample of 50 screen times has values summing to 1,000 minutes. What is the estimated mean screen time per person?
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MultiChoice
The heights (in inches) of 4 randomly chosen students are 62, 64, 66, 68. Estimate the mean height of the student population.
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MultiChoice
A sample of 20 random athletes exercise a total of 60 hours in a week. What is the estimated population mean hours of exercise per athlete?
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MultiChoice
In a representative sample, scores were 70, 75, 75, 80. What is the sample mean estimate for the population?
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MultiChoice
A random sample of 10 books from a library has a total of 400 pages. What is the estimated mean number of pages per book in the library?
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MultiChoice
Random samples of lunch costs show sample means of $11, $13, $12, $12. What is the best estimate for the mean lunch cost?
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MultiChoice
Which statement best describes the relationship between a random sample mean and the population mean?