1.A sample consists of:
[a] All units of the population
[b] 50 per cent units of the population
[c] 5 per cent units of the population
[d] Any fraction of the population
2. Sampling is inevitable in the situation[s]:
[a] Blood test of a person
[b] When the population is infinite
[c] Testing of life of dry battery cells
[d] All the above
3. The number of possible samples of size n out of N population units without replacement is:
[a] Ncn [b] [N]n [c] n² [d] N!
4. The number of possible samples of size two from a population of 4 units under SRSWOR:
[a] 6 [b] 4 [c] 8 [d] 16
5. Probability of drawing a unit at each selection remains same in:
[a] SRSWOR [b] SRSWR
[c] Both [a] and [b] [d]None of them
6. Probability of selection varies at each subsequent draw in:
[a] Sampling without replacement
[b] Sampling with replacement
[c] Both [a] and [b]
[d] Neither [a] nor [b]
7. An unordered sample of size n can occur in:
[a] n ways [b] n! ways [c] one way [d] n² ways
8. A selection procedure of a sample having no involvement of probability is known as:
[a] Purposive sampling [b] Judgement ssampling
[c] Subjective sampling [d] All the above
9. Simple random sample can be drawn with the help of :
[a] Random number tables [b] Chit method
[c] Roulette wheel [d] All the above
10. Sampling frame is a term used for:
[a] A list of random numbers
[b] A list of voters
[c] A list of sampling units of a population
[d] None of the above
11. If the items are destroyed under investigation, we have to go for:
[a] Complete enumeration [b] Sampling studies
[c] Both [a] and [b] [d] Neither [a] nor [b]
12. The discrepancies between sample estimate and population parameter is termed as:
[a] Human error [b] Formula error
[c] Non-sampling error [d] Sampling error
13. A function of variates for estimating a parameter is called:
[a] An estimate [b] An estimator
[c] A frame [d] A statistic
14. An estimator can possess:
[a] A fixed value [b] Any value
[c] Both [a] and [b] [d] Neither [a] nor [b]
15. The most important factor in determining the size of the sample is:
[a] The availability of resources [b] Purpose of the survey
[c] Heterogeneity of population [d] None of the above
16. If the observations recorded on five sampled items are 3, 4, 5, 6, 7 the sample variance is:
[a] 1 [b] 0 [c] 2 [d] 2.5
17. If all observations in a set of observations are same, the variance of the set of values is:
[a] Zero [b] One
[c] Infinity [d] Not possible to calculate
18. In simple random sampling with replacement, the same sampling unit may be included in the sample:
[a] Only once [b] Only twice
[c] More than once [d] None of the above
19. Under proportional allocation, the size of the sample from each stratum depends on:
[a] Total sample size [b] Size of the stratum
[c] Population size [d] All the above
20. Systematic sampling means:
[a] Selection of ‘n’ continuous units
[b] Selection of ‘n’ units situated at equal distance
[c] Selection of ‘n’ largest units
[d] Selection of ‘n’ middle units in a sequence