| 1 |
A specific value of an estimator computed from the sample data is called |
- A. estimation
- B. estimate
- C. interval estimate
- D. point estimate
|
| 2 |
Confidence intervals which are often used in practice are |
- A. 90%
- B. 95%
- C. 98%
- D. all of these
|
| 3 |
Types of statistical inferences are |
- A. one
- B. two
- C. three
- D. four
|
| 4 |
|
- A. biased
- B. unbiased
- C. positively biased
- D. none of these
|
| 5 |
The distance between an estimate and the estimated parameter is called: |
- A. Sampling error
- B. Standard error
- C. Bias
- D. Error of estimation
|
| 6 |
The following statistic are unbiased estimators: |
- A. The Sample mean
- B. S<sup>2</sup> = Σ(X - X)<sup>2</sup>/n-1
- C. The sample proportion
- D. All the above
|
| 7 |
Small sample has less than |
- A. 50 values
- B. 45 values
- C. 30 values
- D. 35 values
|
| 8 |
An estimator is ------------ if its expected value is equal to the population parameter to be estimated |
- A. bad
- B. biased
- C. unbiased
- D. none of these
|
| 9 |
A single value used to estimate a population value is called: |
- A. Interval estimate
- B. Point estimate
- C. Confidence interval
- D. Level of confidence
|
| 10 |
If 1-α = 0.90, the value of Z<sub>a/2</sub> is: |
- A. 1.645
- B. 1.96
- C. 2.326
- D. 2.575
|
