Questions
A sample selected from a population consists which of the following?
- All units of the population
- Only $50\%$ of the units of the population
- Only $15\%$ of the units of the population
- Some units of the population
Which of the following statements is true?
- A sample in which a unit is selected after replacing the unit selected earlier in the population is called a sample without replacement.
- If a unit is to be destroyed during an inquiry then sample inquiry is not necessary but also inevitable.
- In any sampling method, the sample size is larger than the population size.
- Stratified random sampling is best if the population is homogeneous.
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?
- Select an equal number of units from each stratum at random.
- Draw unequal number of units from each stratum and weigh the result.
- Draw number of units from each stratum proportional to their size in the population
- None of the above
Which of the following statement is true?
- 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.
- In any simpling method, the size does not depend on population.
- In systematic sampling, all units of the population have equal chance of being elected in the sample.
Which sampling is affected the most if there is hidden periodicity in population?
- simple random sampling
- Stratified random sampling
- Systematic sampling
- Both (b) & (c)
A security checkpoint that cheks every vehicle entering into the mall is an example of which of the following?
- Census inquiry
- Stratified random sampling
- Systematic sampling
- Simple random sampling
State whether the following statements are 'true' or 'false':
Units on the sample should be selected within the same time duration.
- True
- False
State whether the following statements are 'true' or 'false':
A simpling plan that selects units from a population at uniform intervals in time, value or position it called stratified sampling.
- True
- False
State whether the following statements are 'true' or 'false':
A statistic is a characteristic of a population.
- True
- False
A parameter and statistic respectively are characteristics of which of the following?
- Population and sample
- Sample and population
- Sample and sample
- Population and population
State whether the following statements are 'true' or 'false':
Each unit of the populations is examined in census inquiry.
- True
- False
State whether the following statements are 'true' or 'false':
A sampling method that divides the population into homogeneous groups from which random samples are drawn is known as systematic sampling.
- True
- False
State whether the following statements are 'true' or 'false':
In simple random sampling method, each unit of the population has an equal chance of being included in the sample.
- True
- False
State whether the following statements are 'true' or 'false':
When properties of the units of the population have more dissimilarities, the use of stratified random sampling method is advantageous.
- True
- False
Population are unlimited in size are referred to as____________.
- infinite populations.
- finite populations.
- census method.
- none of the above