Question

Quota sampling:

Select one:

a. involves taking a stratified sample in which the number of sampling units drawn from each stratum is in proportion to the relative population size of that stratum

b. ensures that certain characteristics of a population sample will be represented to the exact extent that the researcher desires.

c. obtains units or people who are most conveniently available.

d. selects an initial starting point by a random process, and then selects every nth number on the list.

A disproportional stratified sample:

Select one:

a. obtains units or people who are most conveniently available

b. is a stratified sample in which the sample size for each stratum is allocated according to analytical considerations

c. involves taking a stratified sample in which the number of sampling units drawn from each stratum is in proportion to the relative population size of that stratum.

d. selects an initial starting point by a random process, and then selects every nth number on the list

3. Sampling can:

Select one:

a. all of the above.

b. reduce the labor requirements of an interview study.

c. reduce the costs of the study.

d. gather important information in a short period of time.

4.

To determine sample size, the unknown standard deviation of a population may be estimated by:

Select one:

a. a pilot study.

b. similar studies conducted in the past

c. the range of the data for the sample divided by six

d. any of the above.

Answer 1

1. Quota sampling: Option: b. ensures that certain characteristics of a population sample will be represented to the exact extent that the researcher desires.

2. A disproportional stratified sample: Option: b. is a stratified sample in which the sample size for each stratum is allocated according to analytical considerations

3. Sampling can: Option a. all of the above.

Since (Sampling reduces the labor requirements of an interview study, the costs of the studyand  gather important information in a short period of time.)

4. To determine sample size, the unknown standard deviation of a population may be estimated by:

Option: d. any of the above.

Since we can determine sample size using any one of three methods:

1. a pilot study; 2. similar studies conducted in the past; 3. the range of the data for the sample divided by six.