Question

1. For each of the following situations, identify the likely data collection approach and then identify your sample: the population of interest, the type of sample, and the sampling procedures you would use. Explain your rationale and any known limitations given the situation.

a. There has been increasing concern about the ability of the federal government to attract college graduates as employees. Your team has been asked to determine what image college students have about working for the federal civil service. However, there is no listing of all college students, and privacy laws prohibit the colleges from giving out their addresses.

b. Your organization’s diversity task force wants to find out the attitudes of managers and frontline workers about diversity. The task force would like to conduct an attitude survey and asks you for advice about the sample.

c. What sampling strategy would you use to determine the number of potholes in the city?

d. The director of the child welfare agency is interested in the length of time that families receive protective services. She asks you to provide information regarding the number of treatment hours received by these clients. The data are not in a computer, so you will have to look at closed files. The agency has been in operation for twenty years and has served over 100,000 clients.

e. The city council wants to find out the citizens’ views about the challenges facing the city in the next two years.

Answer #1

For each of the following situations, state which type of
sampling plan was used. Explain whether you think the sampling plan
would result in a biased sample.
a) You randomly sample 15 schools out of 50 elementary schools in
your city, and then select every student in those 15 schools to be
in your sample, for a total of 1500 students.
b) You randomly sample 1500 students across all 50 elementary
schools in your city.
c) Out of the 50...

3.54 What kind of sample? In each of the following
situations, identify the sample as an SRS, a stratified random
sample, a multistage random sample, or a voluntary response sample.
Explain your answers.
(a) There are seven sections of an introductory
statistics course. A random sample of three sections is chosen, and
then random samples of eight students from each of these sections
are chosen.
(b) A student organization has 55 members. A table of
random numbers is used to...

1. Identify the type of data that would be used to describe a
response, and give an example of the data. (Qualitative,
Quantitative Discrete, Quantitative Continuous)
a. Number of books you read this semester.
b. The height of a baseball player in UHV baseball team.
c. The time it takes to drive to campus.
2. The marketing manager for an electronics chain store wants
information about the ages of its customers. Over the next two
weeks, at each store location,...

For each of the following examples, identify the independent and
dependent variables and indicate whether the research involves the
use of descriptive or inferential statistics. Justify your answer
(explain!).
a) A researcher wants to determine how the Gross Domestic
Product (GDP) affects the number of unemployed people in
Canada.
b) Researchers are trying to understand whether students’
opinions about the quality of food at the cafeteria varies with
their ages based on results from a sample of 100 students.
c)...

PART 1:
Sampling
How we select our sample will directly influence the
external validity of the study. If a sample is
representative, then our external validity
is stronger. If a sample is non-representative, then our external
validity is weaker.
QUESTIONS:
1.
You are interested in looking at the relationship between
student-to-teacher ratio and GPA at California 2- and 4-year
colleges. You suspect that average GPA is higher at 2-year colleges
where student-to-teacher ratio is low, relative to 4-year colleges
colleges...

Question 1
Identify business processes from
your own experience that may have been competitive at some stage,
but which seem at this point to be unnecessarily complex or
outdated given what competitors offer?
Question 2
Consider the following list
and indicate which of these you would consider as process redesign
initiatives. Motivate your answer and, if applicable, provide the
links to the elements discussed.
An airline has seen its profits falling over the past year. It
decides start a marketing...

1. Establish the appropriate hypotheses for the following
situations:
to. A company has used a process for many months to manufacture a
product. Design and manufacturing engineers have developed a new
process. Two controlled experiments were carried out, one for each
method, in order to compare the methods. The process will only be
changed if there is strong evidence that the proportion of good
parts increased by 5%.
b. You are an engineer in charge of a process on the...

Q 6 Identify the type of primary scale of measurement being used
in each of the following cases. Please give a rationale (in one
sentence) for each case.
(a) I like to solve crossword puzzles
Disagree Agree
1 2 3 4 5
(b) How old are you?
(c) Please rank the following activities in terms of your
preference by assigning ranks 1 (most preferred) to 5 (least
preferred).
i. Reading magazines
ii. Watching television
iii. Dating
iv. Shopping
v. Eating...

According to a study by the National Institute on Alcohol Abuse
and Alcoholism, 19% of college students between the ages of 18 and
24 meet the criteria for alcohol abuse or dependence.
Coker University wants to determine whether it has a lower,
average, or higher rate of alcohol abuse than the national average.
A random sample of 49 students is selected, and evaluated for signs
of alcohol abuse or dependence.
a. Identify n for the binomial experiment.
b. Identify p...

Read carefully through the following problems (Questions 5-8).
Each problem is accompanied by a null and an alternative
hypothesis, and each set of hypotheses includes at least one
mistake. We would like you to identify what the mistake(s)
is/are.
A claim is made that adults spend an average of $475 per year
on birthday presents. A researcher believes this value is too low,
and she sets out to gather data to test this claim. Her null and
alternative hypotheses are...

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