Sample QuestionsSampling methods questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
A security checkpoint that ‘checks every vehicle entering into the mall is an example of which of the following ?
- ✓
- B
Stratified random sampling
- C
- D
Answer: A.
View full solution →Suppose we are using stratified sampling for a particular population and have divided it into strata of different sizes. How can we now make sample selection?
- A
Select an equal number of units from each Stratum at random.
- B
Draw unequal number of units from each Stratum and weigh the results.
- ✓
Draw number of units from each stratum proportional to their size in the population.
- D
Answer: C.
View full solution →Which sampling is affected the most if there is hidden periodicity in population ?
- A
- B
Stratified random sampling
- ✓
- D
Both $(b)$ and $(c)$
Answer: C.
View full solution →A parameter and statistic respectively are characteristics of which of the following ?
- ✓
- B
- C
- D
Population and Population
Answer: A.
View full solution →Which of the following statements is true ?
- A
In stratified random sampling, all the units of the population have equal chance of being selected in the sample.
- ✓
In simple random sampling all units of the population have equal chance of being selected in the sample.
- C
In any sampling method, the sample size does not depend on population.
- D
In systematic sampling, all units of the population have equal chance of being selected in the sample.
Answer: B.
View full solution →When can the systematic random sample be biased ?
When is the use of stratified random sampling considered to be favourable or suitable ?
What do you mean by a sample without replacement ?
What is meant by population inquiry ?
Which type of inquiry involves more errors ?
Select all possible systematic samples of size $3$ from a population of size $12.$
View full solution →An owner of a service station has a list of $1000$ car owners who have got their car repaired at his service station. He wishes to conduct satisfaction survey of $50$ car owners. Explain how a sample of $50$ car owners can be selected using systematic sampling.
View full solution →There are $40$ flats in a multi—storied apartment. $5$ flats are to be selected using systematic sampling from $40$ flats for decoration in a cultural program. Explain how the sample can be selected ?
View full solution →Define stratum in stratified random sampling.
Explain the process of stratification.
Draw a random sample of size $5$ $(i)$ with replacement $(ii)$ without replacement from a population of $50$ units using the following $15$ two digit random numbers: $62, 25, 6, 60, 95, 55, 98, 11, 71, 25, 20, 45, 89, 27, 40$
View full solution →Write a note on systematic sampling.
State the disadvantages of stratified random sampling.
Write a note on stratified random sampling.
Write a note on simple random sampling.
For studying the usage of mobile phones, randomly select $7$ persons without replacement from $30$ boys and $20$ girls from a locality of a city. There should be $3$ boys and $4$ girls in the randomly selected $7$ persons.
Random numbers for boys : $82, 95, 18, 96, 20, 84, 56, 11, 52, 03$
Random numbers for girls : $04, 40, 34, 13, 72, 11, 50, 55, 08, 11, 76, 18$
View full solution →Draw a random sample of $1$ percent students without replacement from 1500 students of a particular college for giving their opinion on college facilities. There are $600$ students in First year $(FY), 500$ students in Second year $(SY)$ and $400$ students of Third year $(TY)$ class in the college. Use the following $40$ three — digit random numbers :
$158, 092, 411, 745, 009, 724, 674, 550, 716, 359, 419, 969, 200, 458, 384, 019, 676, 631,$
$390, 557, 299, 786, 706, 206, 729, 344, 543, 309, 227, 483, 741 766,$
$027, 070, 648, 956, 238, 912, 480, 558.$
(Use the first $14$ random numbers for $FY$, next $14$ random numbers for $SY$ and remaining random numbers for $TY$)
View full solution →Draw a random sample of $7$ Income tax files without replacement from a population of $5000$ Income tax files for scrutiny.
View full solution →