Question 1

In considering sample size,the bigger the sample,the greater the ____.
A)power
B)range
C)standard error
D)variance

Accepted Answer

The power of a study is directly related to the sample size. Increasing the sample size increases the power of a study, which refers to the ability to detect a true effect if it exists. A larger sample size is more likely to accurately represent the population being studied and to reduce the likelihood of sampling errors. The range, standard error, and variance can also be affected by sample size, but they are not directly proportional to it in the way that power is.

Question 2

What type of sample divides the population into nonoverlapping groups of N₁,N₂,N₃,...Ni,such that N₁ + N₂ + N₃ + ...+ Ni + N = N,and then performs a simple random sample of ƒ = n/N in each of the nonoverlapping groups?​
A)simple random
B)stratified random
C)systematic random
D)cluster random

Accepted Answer

The described sample design is known as stratified random sampling, where the population is divided into nonoverlapping groups based on certain characteristics or variables, and a simple random sample is taken from each group in proportion to its size. This method can increase the precision and representativeness of the sample since it accounts for variability within the population and ensures adequate representation of each subgroup.

Question 3

When sampling,there is the possibility of introducing systematic error,or _______________.

Accepted Answer

The answer of When sampling,there is the possibility of introducing...

Question 4

In sampling notation,ƒ = n/N refers to ____.
A)the number of cases in the sampling frame
B)the number of cases in the sample
C)the number of possible subsets
D)the sampling fraction

Accepted Answer

In sampling notation, ƒ refers to the sampling fraction, which is the ratio of the number of cases in the sample (n) to the number of cases in the sampling frame (N). Therefore, the correct answer is D. A refers to the total number of cases in the sampling frame, B is the number of cases in the sample, and C is the number of possible subsets, which is not related to the sampling notation.

Question 5

Tonja wants to evaluate the effects of a new school breakfast program on student conduct and academic achievement.She cannot evaluate every student in every school in the district,so she randomly selects several schools and then collects data on all of the students in those schools.What type of sample is she using?​
A)simple random
B)stratified random
C)systematic random
D)cluster random

Accepted Answer

Tonja is using a cluster random sample because she is randomly selecting entire schools (clusters) and then collecting data on all of the students within those schools.

Question 6

Assembling a sample of persons with known or demonstrable experience in some area is referred to as _______________.

Accepted Answer

The answer of Assembling a sample of persons with known...

Question 7

The model for generalizing in which the population is identified,a fair sample is drawn,the research is conducted,and finally the results are generalized to other populations or groups is referred to as a(n)_______________.

Accepted Answer

The answer of The model for generalizing in which the...

Question 8

In what type of sample would you divide the sample into groups,typically along geographic lines,randomly select groups,and then measure all units within the sampled groups?​
A)simple random
B)stratified random
C)systematic random
D)cluster random

Accepted Answer

This is a description of cluster random sampling, where the population is divided into clusters (in this case, geographic areas), then a random sample of clusters is selected, and all units within each selected cluster are measured.

Question 9

The process of making an inference that the results observed in a sample would hold in the population of interest is referred to as _______________.

Accepted Answer

The answer of The process of making an inference that...

Question 10

In sampling notation,n refers to the ____.
A)number of cases in the sampling frame
B)number of cases in the population
C)number of possible units in the sample
D)sampling fraction

Accepted Answer

In sampling notation, "n" refers to the number of units (or cases) in the sample, not the population, sampling frame, or sampling fraction.

Question 11

The dimension along which a study context can be related to other potential contexts to which the results might generalize is called the _______________.

Accepted Answer

The answer of The dimension along which a study context...

Question 12

A sampling method where you determine randomly where you want to start selecting in the sampling frame and then follow a rule to select every x^th element in the sampling frame list is called a ____ method. A)simple random B)stratified random C)systematic random D)cluster random

Accepted Answer

The method described in the question is systematic random sampling. This method is useful when a complete list of the sampling frame is available and the objective is to get a representative sample. The process involves selecting a random starting point and then selecting every xth element in the sampling frame list. This ensures equal probability of selection and eliminates bias in the selection process.

Question 13

What type of sample selects n units out of N such that each _NC_n has an equal probability of being samples,simply by using a table of random numbers,a computer random-number generator,or a mechanical device to select the sample? A)simple random B)stratified random C)systematic random D)cluster random

Accepted Answer

Simple random sampling is the only method mentioned in the options that ensures each NCn has an equal probability of being sampled. Stratified random sampling divides the population into subgroups and samples from each subgroup, while systematic and cluster random sampling involve selecting units based on a pre-determined pattern or grouping, respectively.

Question 14

In research,_______________ is the process of selecting units for study from a population of interest.

Accepted Answer

The answer of In research,_______________ is the process of selecting...

Question 15

The degree to which the conclusions in your study would hold for other persons in other places and at other times is referred to as _______________.

Accepted Answer

The answer of The degree to which the conclusions in...

Question 16

The _______________ is a model for generalizing from a study to other contexts based upon the degree to which the other context is similar to the study context.

Accepted Answer

The answer of The _______________ is a model for generalizing...

Question 17

A(n)_______________ indicates the lower and upper bounds of the estimate of a statistic.

Accepted Answer

The answer of A(n)_______________ indicates the lower and upper bounds...

Question 18

Stratified random sampling that tries to ensure an equal number of units per group is also called ____ random sampling.
A)modal
B)disproportionate
C)independent
D)proportional

Accepted Answer

Stratified random sampling that ensures an equal number of units per group is called proportional random sampling. In this method, the size of the sample taken from each stratum is proportional to the size of that stratum relative to the population. This helps to reduce bias and increase the representativeness of the sample.

Question 19

The difference between nonprobability and probability sampling is that nonprobability sampling does not involve _______________ and probability sampling does.

Accepted Answer

The answer of The difference between nonprobability and probability sampling...

Question 20

After a large local charity is rocked by a spending scandal,Marc wants to know how benefactors feel about the charity and what changes they would like to see made in the future.Marc randomly selects 100 individuals from the list of 1500 by using a random number generator.Marc's sample is best described as a ____ sample.
A)simple random
B)stratified random
C)systematic random
D)cluster random

Accepted Answer

Marc randomly selects individuals from the list of 1500 using a random number generator, making it a simple random sample. Stratified random sampling involves dividing the population into subgroups and then randomly selecting individuals from each subgroup, systematic random sampling involves selecting individuals at equal intervals from a list, and cluster random sampling involves dividing the population into clusters and then randomly selecting entire clusters to sample from. None of these methods were described in the scenario.

Quiz 4: Sampling Foundations of Sampling

In considering sample size,the bigger the sample,the greater the ____.

What type of sample divides the population into nonoverlapping groups of N₁,N₂,N₃,...Ni,such that N₁ + N₂ + N₃ + ...+ Ni + N = N,and then performs a simple random sample of ƒ = n/N in each of the nonoverlapping groups?​

When sampling,there is the possibility of introducing systematic error,or _______________.

In sampling notation,ƒ = n/N refers to ____.

Assembling a sample of persons with known or demonstrable experience in some area is referred to as _______________.

The model for generalizing in which the population is identified,a fair sample is drawn,the research is conducted,and finally the results are generalized to other populations or groups is referred to as a(n)_______________.

In what type of sample would you divide the sample into groups,typically along geographic lines,randomly select groups,and then measure all units within the sampled groups?​

The process of making an inference that the results observed in a sample would hold in the population of interest is referred to as _______________.

In sampling notation,n refers to the ____.

The dimension along which a study context can be related to other potential contexts to which the results might generalize is called the _______________.

A sampling method where you determine randomly where you want to start selecting in the sampling frame and then follow a rule to select every xth element in the sampling frame list is called a ____ method.

What type of sample selects n units out of N such that each NCn has an equal probability of being samples,simply by using a table of random numbers,a computer random-number generator,or a mechanical device to select the sample?​

In research,_______________ is the process of selecting units for study from a population of interest.

The degree to which the conclusions in your study would hold for other persons in other places and at other times is referred to as _______________.

The _______________ is a model for generalizing from a study to other contexts based upon the degree to which the other context is similar to the study context.

A(n)_______________ indicates the lower and upper bounds of the estimate of a statistic.

Stratified random sampling that tries to ensure an equal number of units per group is also called ____ random sampling.

The difference between nonprobability and probability sampling is that nonprobability sampling does not involve _______________ and probability sampling does.

What type of sample divides the population into nonoverlapping groups of N₁,N₂,N₃,...Ni,such that N₁ + N₂ + N₃ + ...+ Ni + N = N,and then performs a simple random sample of ƒ = n/N in each of the nonoverlapping groups?

In what type of sample would you divide the sample into groups,typically along geographic lines,randomly select groups,and then measure all units within the sampled groups?

A sampling method where you determine randomly where you want to start selecting in the sampling frame and then follow a rule to select every x^th element in the sampling frame list is called a ____ method.

What type of sample selects n units out of N such that each _NC_n has an equal probability of being samples,simply by using a table of random numbers,a computer random-number generator,or a mechanical device to select the sample?