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Concept Of Point And Interval Estimation Quiz 1 (16 MCQs)

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1. A property of a point estimator that occurs whenever a large sample sizes tend to provide point estimates closer to the population parameter
2. Values that belong to a population
3. It is denoted by $ \mu$ .
4. When the confidence level is 90%, alpha level is 0.01.
5. A point estimate of a population consists of how many numbers?
6. It is the difference between a value and the mean.
7. The lifetime of a certain type of battery is known to be normally distributed with a standard deviation of 20 hours. A sample of 50 batteries had a mean lifetime of 120.1 hours. It is desired to construct a 99% confidence interval for the mean lifetime of this type of battery.What is the Confidence Interval to one decimal place?
8. It is a mathematical model for decision making
9. What is the critical value z-value for a 99% confidence interval?
10. It is a subset of a set of data.
11. Find the value of $ z_{\frac{\alpha}{2}}$ for a 90% confidence interval.
12. It is denoted by $ \sigma$ .
13. For 95% confidence level, the coefficients are $ \pm1.65$
14. It is a set of data one wishes to investigate.
15. When $ \alpha=0.01$, the confidence coefficients are $ \pm1.96$
16. Given the interval (1.2, 1.8), what is the point estimate and the margin of error?

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