Atividade - Statistics 1 - Anhembi Morumbi

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Curso Estatística
Teste Atividade - Statistics 1
Iniciado 10/05/20 14:16
Enviado 03/06/20 13:27
Status Completada
Resultado da tentativa 9 em 10 pontos 
Tempo decorrido 575 horas, 10 minutos
Resultados exibidos Respostas enviadas, Respostas corretas, Comentários
Pergunta 1
Resposta Selecionada: 
Resposta Correta: 
Feedback da resposta:
Skills: Generate graphical displays of the distribution of a quantitative variable and use them to
summarize the overall pattern of the distribution.Identify subjects and variables
"multiple choice" question: select the correct answer. Here again, is the side-by-side boxplots that
display the delivery time distributions (in minutes) of two pizza shops – “Big Slice” and “City Pizza” 
Within which delivery time interval would you expect to find the largest number of City Pizza deliveries?
Between 25 and 30 minutes
Between 25 and 30 minutes
This is correct.
Pergunta 2
Skills: Summarize the distribution of a categorical variable. Identify subjects and variables
"multiple choice" question: select the correct answer. A June 2017 poll asked a random sample of
2,500 U.S. adults the following question:Which comes closest to your view about the 2010 health care
law (Obamacare)? The law is working well and should be kept in place as is;There are some good
things in the law, but some changes are needed to make it work better;The law has so much wrong
with it that it needs to be repealed entirely.The following pie-chart represents the distribution of
responses:
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Resposta Selecionada: 
Resposta Correta: 
Which of the following statements is true regarding what we can learn from the above distribution?
All of the above statements are true.
All of the above statements are true.
Pergunta 3
Resposta Selecionada: 
Resposta Correta: 
Questions 1-3 are related to the following information:
A college professor records the following information for each of the 55 students enrolled in her class:
• Gender
• Year (Freshman, Sophomore, Junior, Senior)
• Number of missed classes
• Midterm score
• Extra credit (1 – Submitted, 2 – Not submitted)
• Final exam score
Skills: Understand the structure of a data set and identify different type of variables. Identify subjects
and variables
"multiple choice" question: select the correct answer. 
What are the individuals in this dataset?
The 55 students enrolled in the professor’s class
The 55 students enrolled in the professor’s class
Pergunta 4
Skills: 
Identify direction
Identify subjects and variables
Assess strengthIdentify form
"Fill in the blank" question: select the correct answer. This is a scatter plot showing the amount of sleep
needed per day by age. What type of relationship is represented between age and hours of sleep
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Resposta Selecionada: 
Resposta Correta: 
Feedback da
resposta:
needed? The direction of this relationship is . In the context of this example, this means that as we age
we tend to need sleep. The form of the relationship tends to be and
negative
negative
Correct! The direction is sloping downward, which indicates a negative
relationship. Great job!
Pergunta 5
Resposta Selecionada: 
Resposta Correta: 
Questions 1-3 are related to the following information:
A college professor records the following information for each of the 55 students enrolled in her class:
• Gender
• Year (Freshman, Sophomore, Junior, Senior)
• Number of missed classes
• Midterm score
• Extra credit (1 – Submitted, 2 – Not submitted)
• Final exam score
Skills: Understand the structure of a data set and identify different type of variables.Identify subjects
and variables
"multiple choice" question: select the correct answer. How many variables are there in this dataset?
55
6
Pergunta 6
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Resposta Selecionada: 
Resposta Correta: 
Feedback da
resposta:
Skills: Identify subjects and variables Generate numerical measures of center of spread of the
distribution of a quantitative variable and use them to summarize the distribution. 
"multiple choice" question: select the correct answer.
Based on the collected data we can say that approximately 68% of the self-employed individuals work:
between 39 and 55 hours
between 39 and 55 hours
This is correct. By the Standard Deviation Rule, approximately 68% of self-employed
individuals work between 47−8=39and 47+8=55 hours.
Pergunta 7
Resposta Selecionada: 
Resposta Correta: 
Feedback
da
resposta:
Skills: Identify subjects and variablesGenerate numerical measures of center of spread of the
distribution of a quantitative variable and use them to summarize the distribution.
"multiple choice" question: select the correct answer. Here again, is the distribution of number hours of
exercise per week for 50 male college student:
What are appropriate numerical measures of center and spread in this case?
None of the above.
None of the above.
This is correct. Since the distribution is skewed right (with one possible high outlier), the
appropriate numerical measure of center and spread are the median and IQR.
Pergunta 8
Skills: Identify subjects and variablesGenerate numerical measures of center of spread of the
distribution of a quantitative variable and use them to summarize the distribution.
"multiple choice" question: select the correct answer. Here again, is the distribution of number hours for
exercise per week of 50 male college student:
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Resposta
Selecionada:
Resposta Correta:
Feedback
da
resposta:
If the largest observation (23 hours) was wrongly recorded as 230 hours. How would that effect the
mean, median and the standard deviation of this distribution?
The mean and standard deviation will increase, but the median will not
change.
The mean and standard deviation will increase, but the median will not
change.
This is correct. The mean and standard deviation are affected by outliers (and therefore
will increase), but the median is not affected by outliers and therefore will not change.
Pergunta 9
Skills: Identify subjects and variablesGenerate numerical measures of center of spread of the
distribution of a quantitative variable and use them to summarize the distribution.
"multiple choice" question: select the correct answer. Here again, is the distribution of number hours of
exercise per week for 50 male college student:
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Resposta Selecionada: 
Resposta Correta: 
What do you expect the relationship between the mean and the median of this distribution to be?
The mean will be larger than the median
The mean will be larger than the median
Pergunta 10
Resposta Selecionada: 
Resposta Correta: 
Feedback da resposta:
Questions 1-3 are related to the following information:
A college professor records the following information for each of the 55 students enrolled in her class:
• Gender
• Year (Freshman, Sophomore, Junior, Senior)
• Number of missed classes
• Midterm score
• Extra credit (1 – Submitted, 2 – Not submitted)
• Final exam score
Skills: Understand the structure of a data set and identify different type of variables.Identify subjects
and variables
"multiple choice" question: select the correct answer. 
Which of the following is a categorical variable?
Extra credit (1 – Submitted, 2 – Not submitted)
Extra credit (1 – Submitted, 2 – Not submitted)
This is correct.
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