Determining sample size for stratum is problem of___________?

Related Mcqs:

1. A list of sample _________ is called sample space?

   A. Events
   B. Subset
   C. Piont
   D. Distinct

2. If the sampled population has a normal distribution, when is the sampling distribution of the sample mean X also a normal distribution ?

   A. Only when the sample size is at least 100.
   B. Only when the sample size is smaller than 30
   C. Always
   D. Only when the sample size is at least 30.

3. Random samples of size 17 are from a population that has 200 elements, a mean of 36, and a standard deviation of 8. which of the following best describes the from of the sampling distribution of the sample mean for this situation ?

   A. Approximately normal because the sample size is small relative to the population size
   B. Approximately normal because of the central limit theorem
   C. Exactly
   D. None of these alternatives is correct

4. A sample of 24 observations is taken from a population that has 150 elements. The sampling distribution of is___________?

   A. Approximately normal because is always approximately normally distributed
   B. Approximately normal because the sample size is large in comparsion to the population size
   C. Approximately normal because of the central limit theorem
   D. Normal if the population is normally distributed

5. If in a sampling distribution of X the sample size is 25, what assumption must hold for the sampling distribution of X to be normal ?

   A. Population distribution is normal
   B. μ1 = μx
   C. Population distribution is uniform
   D. σx = σx /√n

6. Non-sample errors are reduced by:________________?

   A. Increasing the sample size
   B. Reduced the amount of data
   C. Decreasing the sample standard deviation
   D. None of these

7. The process of selecting sample from the population is called_________________?

   A. Sampling process
   B. Sampling unit
   C. Sampling
   D. Size

8. If we increase the sample size, it means that it:_________________?

   A. Increases the Standard error
   B. Decreases the Standard error
   C. Decreases the Standard error
   D. Both (a) and (b)

9. For a population consisting of 4 members, a sample of size ‘2’ is taken replacement, then the number of all the possible samples are?

   A. 4
   B. 8
   C. 16
   D. 32

10. A sample of 92 observations is taken from an infinite population. The sampling distribution of is approximately ?

    A. Normal because is always approximately normally distributed
    B. Normal because the sample size is small in comparison to the population size
    C. Normal because of the central limit theorem
    D. None of these alternatives is correct.