General Statistics Past Questions
Question 16
If the value of \( \bar{x} \) is 70 and the population proportion of sampling distribution is 15 with the standard deviation of 20, then the standard normal variable is:
- A. 2.75
- B. 3.75
- C. 4.75
- D. 5.75
Question 17
In sampling distribution, the formula of calculating standard deviation of sample proportion is as:
- A. Square root of \( \frac{p(1-p)}{n} \)
- B. Square root of \( pq / n \)
- C. Square root of \( ng / p \)
- D. Square root of \( pn/q \)
Question 18
The type of sampling in which the desired and useful information is gathered from the best position holder is classified as:
- A. Quota sampling
- B. Convenience sampling
- C. Purpose-driven sampling
- D. Judgment sampling
Question 19
The value of estimator is subtracted from mean and then divided by standard deviation to calculate:
- A. Random variable with standard error
- B. Sample size of population
- C. Standard normal random variable
- D. Error-free random variable
Question 20
The method of random sampling which is also called area sampling method is classified as:
- A. Statistical sub-cluster sampling
- B. Sub-cluster sampling
- C. Proportional inertia sampling
- D. Cluster sampling
