Atividade - Statistics 1

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 Pergunta 1 
1 em 1 pontos 
 
 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: 
 
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? 
 
Resposta Selecionada: 
The mean and standard deviation will increase, but the median will not 
change. 
Resposta Correta: 
The mean and standard deviation will increase, but the median will not 
change. 
Feedback da 
resposta: 
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 2 
1 em 1 pontos 
 
 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needs to be repealed entirely.The following pie-chart represents the distribution of responses: 
 
 
Which of the following statements is true regarding what we can learn from the above distribution? 
Resposta Selecionada: 
All of the above statements are true. 
Resposta Correta: 
All of the above statements are true. 
 
 
 Pergunta 3 
1 em 1 pontos 
 
 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 distribution of number hours of 
exercise per week for 50 male college student: 
 
 
Which of the following best describes the shape of the distribution? 
Resposta Selecionada: 
Skewed right with one possible outlier 
Resposta Correta: 
Skewed right with one possible outlier 
 
 
 Pergunta 4 
1 em 1 pontos 
 
 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? 
Resposta Selecionada: 
Between 25 and 30 minutes 
Resposta Correta: 
Between 25 and 30 minutes 
 
Feedback da resposta: This is correct. 
 
 Pergunta 5 
1 em 1 pontos 
 
 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” 
 
 
Which pizza shop has more variability in delivery times? 
Resposta Selecionada: 
 Big Slice 
Resposta Correta: 
 Big Slice 
Feedback da resposta: This is correct. 
 
 
 Pergunta 6 
1 em 1 pontos 
 
 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 16% of self-
employed individuals work less than how many hours per week? 
 
Resposta Selecionada: 
39 
Resposta Correta: 
39 
Feedback da 
resposta: 
This is correct. Based on the Standard Deviation Rule approximately 68% of self-
employed individuals work between 39 and 55 hours. This means that approximately 
16% of self-employed individuals work less than 39 hours and 16% work more than 
55 hours. 
 
 
 Pergunta 7 
1 em 1 pontos 
 
 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: 
 
Resposta Selecionada: 
between 39 and 55 hours 
Resposta Correta: 
between 39 and 55 hours 
Feedback da 
resposta: 
This is correct. By the Standard Deviation Rule, approximately 68% of self-
employed individuals work between 47−8=39and 47+8=55 hours. 
 
 
 Pergunta 8 
1 em 1 pontos 
 
 Skills: Compare distributions 
Identify subjects and variablesInterpret boxplots 
"multiple choice" question: select the correct answer. Who has the higher scores on SSHA, in 
general? 
 
Resposta Selecionada: 
Females 
Resposta Correta: 
Females 
 
Feedback da 
resposta: 
Correct! The box for the females ends up being higher than the males box. 
Good work! 
 
 Pergunta 9 
1 em 1 pontos 
 
 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 
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 
 
 
 
Resposta Selecionada: 
negative 
Resposta Correta: 
negative 
Feedback da 
resposta: 
Correct! The direction is sloping downward, which indicates a negative 
relationship. Great job! 
 
 
 Pergunta 10 
0 em 1 pontos 
 
 Skills: Calculate appropriate conditional percentages. 
Identify subjects and variables "multiple choice" question: select the correct answer. 
What is the correct percentage conversion of Too Many sodas for the Female response? 
 
Resposta Selecionada: 
73.7% 
Resposta Correta: 
21.5% 
 
 
Quarta-feira, 20 de Maio de 2020 12h54min03s BRT