| 1 |
The precision can be increased by ---------------- the sample size |
- A. increasing
- B. decreasing
- C. changing
- D. ignoring
|
| 2 |
A single value used to estimate a population value is called: |
- A. Interval estimate
- B. Point estimate
- C. Confidence interval
- D. Level of confidence
|
| 3 |
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
|
| 4 |
Statistic is an estimator and its calculated value is called: |
- A. Biased estimate
- B. Estimation
- C. Interval estimate
- D. Estimate
|
| 5 |
(1-α) is called: |
- A. Critical value
- B. Level of significance
- C. Level of confidence
- D. Interval estimate
|
| 6 |
Small sample has less than |
- A. 50 values
- B. 45 values
- C. 30 values
- D. 35 values
|
| 7 |
A range of values used to estimate an unknown population parameter is |
- A. a point estimator
- B. An interval estimator
- C. an unbiased estimator
- D. A biased estimator
|
| 8 |
A range of values within which the population parameter is expected: |
- A. Confidence interval
- B. Confidence coefficient
- C. Confidence limits
- D. Level of significance
|
| 9 |
If the observations are paired and the number of pairs is n, then the number of degree of freedom is equal to |
- A. n
- B. n - 1
- C. 2n
- D. 2n - 1
|
| 10 |
If (1-α) is increased, the with of a confidence interval is: |
- A. Decreased
- B. Increased
- C. Constant
- D. Same
|
