Statistics Test 2

Question 1

In the first lecture on sampling on September 23, it was noted that business statistics is divided into two parts: 1) descriptive statistics (includes variables, averages, variation, polygons, etc.) 2?

Answer 1

Inferential

Question 2

Statistics are samples as ___________ are to population.

Answer 2

Parameters

Question 3

The most important characteristic of a samples is ______________________.

Answer 3

to be representative of the universe

Question 4

The management question asked in sampling is _______________________.

Answer 4

What is the parameters?

Question 5

The statistical definition of sampling is ___________________________________.

Answer 5

Making inferences about parameters based on statistics.

Question 6

To ensure representatives, random samples provide that all elements and combinations in universe have that same chance of being included in samples.

Answer 6

False

Question 7

What does it mean to catalog a universe?

Answer 7

Numbering a specific list of names.

Question 8

Since random number tables are random, the “finger” or “pencil” methods of selecting first elements works, but these methods are simply impractical.

Answer 8

True

Question 9

In a certain company, employees are half democrats and half republicans. A political action committee was form of 12 persons. It contains 10 democrats. Speaking of proportionality, statisticians would say Democrats are _____________?

Answer 9

Over representative

Question 10

Universes are composed of layers called_________________

Answer 10

strata

Question 11

In using a random number table, elements are discarded for three reasons: they are duplicates, they are larger than the universe and they are _________.

Answer 11

Zeroes

Question 12

With a universe of N=235, use a random number table to draw a sample of n=35. The sixth number is ________.

Answer 12

202

Question 13

In a large internationals corporation, senior managers are 250 hispanics, 100 non hispanic white, 100 black, and 50 Asian america. When you design a proportional stratified sample of size n=150, how many Asian Americans will be in your sample?

Answer 13

15

Question 14

In the above question, what sampling method will you use to select Asian Americans?

Answer 14

Random

Question 15

Samples that allows every element in the universe the same chance of inclusion are?

Answer 15

C) Random

Question 16

Which of these is not a probability sampling method?

Answer 16

A) Quota Sampling

Question 17

Which sampling method relies on respondents to identify others to interview?

Answer 17

Snowballing method

Question 18

Name the social science journal that specializes in articles about research, methodology, sampling, response rates, validity, and reliability.

Answer 18

The scholarly journal/literature

Question 19

The formula for estimating Mu and Pi only be used with representative samples?

Answer 19

False

Question 20

Non-probability sampling differs from probability sampling in that A) the probability is unknown that elements in the universe will be included in the sample and B) ______________________________

Answer 20

Catalog

Question 21

Last summer, Acuna brothers construction company hired human resources consulting firm to draw a sample (n=100) of its employees (N=1775) and assessed their morale. The sample was drawn, employees interviewed, and a report of findings was written and submitted. A few months later, the CEO hired you as a consultant to determine the statistical merit of the study. How would determine whether the smoke that was drawn was representative?

Answer 21

You need to compare statistics with the parameters.

Question 22

Which sampling method ordinarily involves the lowest cost?

Answer 22

D) Grab

Question 23

For the next questions, assume you drew a systematic sample size of size n=6 from a universe of size N=30.

Answer 23

For the next questions, assume you drew a systematic sample size of size n=6 from a universe of size N=30.

Question 24

What probability does every element in the unvierse

have of being included in the sample?

Answer 24

1/5 =.20

Question 25

If the first number selected us 5, what number is selected second?

Answer 25

10

Question 26

If the first number selected is 3, what number would be selected second?

Answer 26

8

Question 27

What are the best single estimates of a population parameter?

Answer 27

C) point estimates

Question 28

Since they are all probaility methods, random, systematic, and stratified sampling give every element in the universe the same chance of being selected.

Answer 28

False

Question 29

The probability sampling method that forces samples to be representative of universes is called?

Answer 29

Stratified

Question 30

The non-probability sampling method that forces samples to be representative of universes is called?

Answer 30

Quota

Question 31

The most widely used method of sampling is ______?

Answer 31

Random

Question 32

The main idea of stratified sampling over random sampling is that it __________________

Answer 32

C. Guarantees representation of all strata in the sample

Question 33

If a sampling method gives every element in the universe the same and equal chance of being selected for the sample, it is generally agreed that resulting samples will be representative.

Answer 33

False

Question 34

Sample of adequate sizes that are properly drawn using a random number table will be representative of that universe.

Answer 34

False

Question 35

Which of these is a probability sampling method?

Answer 35

H. None is

Question 36

The cheapest sampling method explained in class is _______________

Answer 36

grab

Question 37

To managers who supervise and develop contracts for research studies, one feature of samples is more important that others. It is that samples must be __________

Answer 37

B. Representative

Question 38

In a certain class, you are asked to read an article in scholarly business journal. In the methods section, the author wrote that they drew a random sample for analysis in the study. What is your reaction to this aim?

Answer 38

We don't know for sure

Question 39

Which of these is a probability sampling method?

Answer 39

H. None are

Question 40

Suppose you are a member of a Committee to review proposals from six HR consulting firms to conduct a morale survey of employees. What one key questions would you ask of each presenter to dig deeply into the quality of their proposal?

Answer 40

Which type of sampling they are using?

Question 41

In an article in the psychology journal, Psychological Reports, Dr. Weaver wrote that controversy surrounds most social science issues, such as black-white differences in job satisfaction. For instance, there is considerable published research evidence that blacks are more job satisfied. Yet, there are no differences. He wrote that two samplings shortfalls are responsible for most of this controversy. Please identify

Answer 41

Issue 1: Not representative of the universe Issue 2: nonresponse error