Statistics 2

Prévia do material em texto

Curso Estatística 
Teste Atividade - Statistics 2 
Iniciado 16/07/20 22:21 
Enviado 16/07/20 22:54 
Status Completada 
Resultado da 
tentativa 
9 em 10 pontos 
Tempo decorrido 32 minutos 
Resultados exibidos Respostas enviadas, Respostas corretas, 
Comentários 
 Pergunta 1 
0 em 1 pontos 
 
The Dean of Students at a large university wants to know what 
proportion of a freshmen students are happy with the academic 
advising the university provides. The Dean obtains a list of all 
freshman students who visited the Academic Advising Center during 
the past month and selects and collects data from a random sample of 
100 students from that list. 
Skill: Identify the sampling method and its potential limitations. 
"multiple choice" question: select the correct answer. Which of the 
following sampling methods will likely produce a sample that is biased 
and not representative of the population? 
 
Resposta Selecionada: 
Multistage sampling 
Resposta Correta: 
Volunteer sampling 
 
 
 Pergunta 2 
1 em 1 pontos 
 
The Dean of Students at a large university wants to know what 
proportion of a freshmen students are happy with the academic 
advising the university provides. The Dean obtains a list of all 
freshman students who visited the Academic Advising Center during 
the past month and selects and collects data from a random sample of 
100 students from that list. 
Skill: Identify the sampling method and its potential limitations. 
"multiple choice" question: select the correct answer. The HR 
department chooses a random sample of 5 employees from each of 
the 120 bank’s branches and collects data from the 600 selected 
employees. The sampling method in this case is: 
 
Resposta Selecionada: 
Stratified sampling 
Resposta Correta: 
Stratified sampling 
 
 
 Pergunta 3 
1 em 1 pontos 
 
The Dean of Students at a large university wants to know what 
proportion of a freshmen students are happy with the academic 
advising the university provides. The Dean obtains a list of all 
freshman students who visited the Academic Advising Center during 
the past month and selects and collects data from a random sample of 
100 students from that list. 
Skill: Identify the sampling method and its potential limitations. 
"multiple choice" question: select the correct answer. In this case, all 
the Freshman students who are happy with the advising that the 
university provides is the: 
 
Resposta Selecionada: 
None of the above 
Resposta Correta: 
None of the above 
 
 
 Pergunta 4 
1 em 1 pontos 
 
Skills: Identify the design and other features of a study 
Understand how the design of a study impacts the type of conclusions 
that can be drawn 
"multiple choice" question: select the correct answer. 
 
A study explored the relationship between drinking diet soda and the 
risk of stroke. The researchers followed a group of individuals who are 
‘diet soda drinkers’ and a group of individuals who are not diet soda 
drinkers and found a higher rate of stroke among those who are diet 
soda drinkers. After the researchers collected more data, they 
discovered that the weight of the individuals was significantly higher, 
on average, in the diet soda drinkers group. 
Which of the following is true? 
 
Resposta Selecionada: 
Weight is a lurking variable 
Resposta Correta: 
 
Weight is a lurking variable 
 
 Pergunta 5 
1 em 1 pontos 
 
The Dean of Students at a large university wants to know what 
proportion of a freshmen students are happy with the academic 
advising the university provides. The Dean obtains a list of all 
freshman students who visited the Academic Advising Center during 
the past month and selects and collects data from a random sample of 
100 students from that list. 
 
Skill: Identify the sampling method and its potential limitations. 
"multiple choice" question: select the correct answer. In this case, the 
sampling frame is: 
 
Resposta 
Selecionada: 
 
All the Freshman students who visited the 
Academic Advising Center during the past month 
Resposta 
Correta: 
 
All the Freshman students who visited the 
Academic Advising Center during the past month 
Feedback da 
resposta: 
This is correct. The sampling frame is the list from 
which the sample was chosen. In this case is all the 
freshmen who visited the Academic Advising Center 
during the past month. 
 
 
 Pergunta 6 
1 em 1 pontos 
 
The Dean of Students at a large university wants to know what 
proportion of a freshmen students are happy with the academic 
advising the university provides. The Dean obtains a list of all 
freshman students who visited the Academic Advising Center during 
the past month and selects and collects data from a random sample of 
100 students from that list. 
Skill: Identify the sampling method and its potential limitations. 
"multiple choice" question: select the correct answer. Which of the 
following is true regarding the sample of students chosen? 
 
Resposta 
Selecionada: 
 
Even though the sample is random, it is not 
representative of the population of interest 
Resposta 
Correta: 
 
 
Even though the sample is random, it is not 
representative of the population of interest 
 
 Pergunta 7 
1 em 1 pontos 
 
Unit: Producing Data 
Module: Designing Studies 
A weight loss program provides three follow-up methods to choose 
from for individuals who went through the program and reached their 
desired weight: monthly in-person meeting, monthly on-line meeting, 
and monthly newsletter by mail. In order to assess the effectiveness of 
the three follow-up methods, the program selects a random sample of 
291 individuals who went through the program and reached their 
desired weight and classifies them according to the follow-up method 
that they sign-up for. A year later the study finds that 30% of those who 
chose to sign up for the in-person follow-up method regained more 
than 5 pounds, 50% of those who chose to sign-up for the online 
method regained more than 5 pounds and 70% of those who chose to 
sign-up for the newsletter method regained more than 5 pounds. 
 
Skill: Identify the design and other features of a study 
"multiple choice" question: select the correct answer. 
Which of the following is the correct design of this study? 
 
Resposta Selecionada: 
An observational study 
Resposta Correta: 
An observational study 
Feedback da resposta: This is correct. 
 
 
 Pergunta 8 
1 em 1 pontos 
 
Unit: Producing Data 
Module: Designing Studies 
A weight loss program provides three follow-up methods to choose 
from for individuals who went through the program and reached their 
desired weight: monthly in-person meeting, monthly on-line meeting, 
and monthly newsletter by mail. In order to assess the effectiveness of 
the three follow-up methods, the program selects a random sample of 
291 individuals who went through the program and reached their 
desired weight and classifies them according to the follow-up method 
that they sign-up for. A year later the study finds that 30% of those who 
chose to sign up for the in-person follow-up method regained more 
than 5 pounds, 50% of those who chose to sign-up for the online 
 
method regained more than 5 pounds and 70% of those who chose to 
sign-up for the newsletter method regained more than 5 pounds. 
 
Skill: Identify the design and other features of a study 
"multiple choice" question: select the correct answer. Which of the 
following best describes the design of this study? 
Resposta Selecionada: 
A blind experiment 
Resposta Correta: 
A blind experiment 
Feedback da resposta: This is correct. 
 
 
 Pergunta 9 
1 em 1 pontos 
 
Skill: Determine how the features of a survey impacts the quality of the 
collected data 
"multiple choice" question: select the correct answer. Which of the 
following would be the best question to include in a poll in order to 
assess the opinions of U.S. adults about legalizing marijuana?Resposta 
Selecionada: 
 
Which of the following best describes your view 
about legalizing the use of marijuana? 
Strongly favor legalizing the use of marijuana 
Favor legalizing the use of marijuana 
Oppose legalizing the use of marijuana 
Strongly oppose legalizing the use of marijuana 
Not sure 
Resposta Correta: 
Which of the following best describes your view 
about legalizing the use of marijuana? 
Strongly favor legalizing the use of marijuana 
Favor legalizing the use of marijuana 
Oppose legalizing the use of marijuana 
Strongly oppose legalizing the use of marijuana 
Not sure 
 
 
 Pergunta 10 
1 em 1 pontos 
 
Skills: Identify the design and other features of a study 
Determine how the features of a survey impacts the quality of the 
collected data 
 
Understand how the design of a study impacts the type of conclusions 
that can be drawn 
"Fill in the blank" question: select the correct answer. A study was 
conducted to explore the effect of handwriting style (cursive or block 
letters) on the score of an SAT essay. An identical essay was shown to 
a random sample of 120 SAT essay graders. The graders were 
randomly assigned to grade a cursive version of the essay or a version 
with printed block letters. The average score of the essay with the 
cursive style was higher than the average score of the essay with the 
printed block letters. Complete the the following sentence: 
This is and a control group. 
Respostas Selecionadas: 
does not have 
 
blind 
 
experiment 
Respostas Corretas: 
does not have 
 
blind 
 
experiment 
 
 
Sexta-feira, 31 de Julho de 2020 21h13min41s BRT 
 
	 Pergunta 1
	 Pergunta 2
	 Pergunta 3
	 Pergunta 4
	 Pergunta 5
	 Pergunta 6
	 Pergunta 7
	 Pergunta 8
	 Pergunta 9
	 Pergunta 10