Question

Administrators at A&M Texas university were interested in estimating the percentage of students who are the first in their family to go to college. For each scenario below, identify the type of sample used by the university administrators. Possible answers include simple random sample, systematic sample, stratified sample, cluster sample, census, voluntary response sample, and convenience sample. a) using a computer based list of registered students, select one of the first 25 on the list by random and then contact the students whose name is 50 names later and then every 50 names beyond that.

b) using a computer based list of registered students, contact 1000 students at random .

c) set up a table in the cafeteria every day for a week around breakfast time and ask students to fill out a survey.

d) send ever registered student a text containing the survey question and ask them to reply.

e) select several dormitories at random and contact everyone living in the selected dorms.

f) post the survey on the university website inviting students to participate in the survey.

g) using a computer based list of registered students, contact 200 freshman, 200 sophomores, 200 juniors and 200 seniors selected at random from each class.

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An upper-level sociology class has 120 registered
students: 34 seniors, 57 juniors, 22 sophomores and 7 freshmen.
Imagine that you choose one random student from the classroom
(perhaps by using a random number table).
What is the probability that the student will be a
junior?
What is the probability that the student will be a
freshmen?
If you are asked to select a proportionate stratified
sample of size 30 from the classroom, stratified by class level
(senior, junior, etc), how...

The registrar of the university with the population of N = 4,000
full-time students is asked by the president to conduct a survey
satisfaction with quality of life on campus. The following table
contains a breakdown of 4,000 registered full-time students by
gender and class designation:
Class Designation
Gender
Fr.
Soph.
Jr.
Sr.
Total
Female
700
520
500
480
2200
Male
560
460
400
380
1800
Total
1,260
980
900
860
4000
The registrar intends
to take a probability...

College Smokers
We are interested in estimating the proportion of students at a
university who smoke. Out of a random sample of 200 students from
this university, 47 students smoke.
(a) Calculate a 97% confidence interval for the proportion of
students at this university who smoke.
( , )
(b) If we wanted the margin of error to be no larger than 2% at a
97% confidence level for the proportion of students who smoke, how
big of a sample...

Identify the sampling strategy used in each scenario. Select
from simple random, systematic, stratified, cluster, convenience,
or state that this is not a random sampling strategy.
a. Names are written on ping-pong balls, then the balls are
mixed and drawn at random.
b. The population of those on campus are divided into students,
faculty, and staff. A proportional number are then randomly
selected using simple random sampling from each of the three
groups.
c. Individuals are lined up and every...

Suppose you are the president of the student government. You
wish to conduct a survey to determine the student body's opinion
regarding student services. The administration provides you with a
list of the names and phone numbers of the
739739
registered students.(a) Discuss a procedure you could follow to
obtain a simple random sample of
55
students.
(b) Obtain this sample.
LOADING...
Click the icon to view the portion of the random number
table.
(a) Which of the following procedures...

Dr. Granger is hoping to encourage Coker students who are taking
math courses to visit the Center for Quantitative Literacy for math
tutoring. She decides to conduct a study to find out what types of
advertising or incentives might be effective.
a. What is the population for this study?
Select your answer from one of the following options.
a.
All students in MAT 203
b.
A random selection of 100 Coker students
c.
All Coker students who are taking math...

Summarize this
he sample consisted of 40 students doing their undergraduate
degree. We used Qualitative (descriptive analysis) and qualitative
(content analysis). where we had a survey asking students about the
amount of time they have spent on social media and about their
academic studies. Which we than analyze and use the simple random
sampling technique to find the results of our research. “A simple
random sample is a subset of a statistical population in which each
member of the subset...

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...

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