Estatística 2

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1. Estatística 
 
2. Avaliação e Certificado
 
3. Acesse a atividade e o Certificado de Statistics 2
 
4. Revisar envio do teste: Atividade - Statistics 2
· 
· 
Estatística
· Início
· Estatística
· Avisos
· Material do Curso
· Statistics 1
· Statistics 2
· Statistics 3
· Statistics 4
· Avaliação
· Avaliação e Certificado
· As Minhas Avaliações
Revisar envio do teste: Atividade - Statistics 2
 
	Usuário
	GABRIELA DE OLIVEIRA MEDEIROS
	Curso
	Estatística
	Teste
	Atividade - Statistics 2
	Iniciado
	28/09/20 13:26
	Enviado
	28/09/20 13:33
	Status
	Completada
	Resultado da tentativa
	1 em 10 pontos  
	Tempo decorrido
	6 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. In this case, all the Freshman students who are happy with the advising that the university provides is the:
	
	
	
	
		Resposta Selecionada:
	 
Sampling frame
	Resposta Correta:
	 
None of the above
	
	
	
· Pergunta 2
0 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:
	 
An observational study
	Resposta Correta:
	 
A blind experiment
	
	
	
· Pergunta 3
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:
	 
Cluster sampling
	Resposta Correta:
	 
Volunteer sampling
	
	
	
· Pergunta 4
0 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. When designing and writing questions for a survey, which of the following are issues that you need to pay attention to?
	
	
	
	
		Resposta Selecionada:
	 
Wording of questions
	Resposta Correta:
	 
All of the above
	
	
	
· Pergunta 5
0 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: Understand how the design of a study impacts the type of conclusions that can be drawn
"multiple choice" question: select the correct answer. In this case, can we conclude that any association that is found in the sample was due to causation? In other words, can we conclude that the follow-up method is the cause for whether or not the sampled individuals regained more than five pounds within a year?
	
	
	
	
		Resposta Selecionada:
	 
Yes, since the individuals were randomly assigned to one of the the three follow-up methods
	Resposta Correta:
	 
No, since the individuals chose themselves which follow-up method to sign-up for.
	
	
	
· 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
0 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 the explanatory variable
	Resposta Correta:
	 
Weight is a lurking variable
	
	
	
· Pergunta 8
0 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:
	 
Given the research that has shown that those who use marijuana heavily prior to age 25 are more likely than nonusers to experience a drop in IQ, which of the following best describes your view about legalizing 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
	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 9
0 em 1 pontos
	
	
	
	Skill: Identify the sampling method and its potential limitations.
"multiple choice" question: select the correct answer. The HR department collects data from the 578 of bank’s employees who happen to call the HR department during the past two months. The sampling method in this case is:
	
	
	
	
		Resposta Selecionada:
	 
Volunteer sampling
	Resposta Correta:
	 
Convenience Sampling
	
	
	
· Pergunta 10
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. In this case, the sampling frame is:
	
	
	
	
		Resposta Selecionada:
	 
All the Freshman students who are happy with the advising that the university provides.The 100 students who from which data were obtained. 
	Resposta Correta:
	 
All the Freshman students who visited the Academic Advising Center during the past month
	
	
	
Segunda-feira, 28 de Setembro de 2020 13h33min09s BRT
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