Atividade - Statistics 1

Prévia do material em texto

 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 is the Five Number Summary of students’ scores on a midterm:
min=40Q1=70M=88Q3=93max=100
Which of the following is true?
	
	
	
	
		Resposta Selecionada: 
	
Neither the smallest nor the largest observations are classified as outliers.
	Resposta Correta: 
	
Neither the smallest nor the largest observations are classified as outliers.
	Feedback da resposta: 
	This is correct. Q1−1.5(IQR)=35.5 and Q3+1.5(IQR)=134.5. Therefore, neither the smallest nor the largest observations are classified as outliers.
	
	
	
 Pergunta 2 
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 3 
1 em 1 pontos
	
	
	
	Skills: Calculate appropriate conditional percentages. Identify subjects and variables
"multiple choice" question: select the correct answer. Which numbers would be used to convert to a percentage for Female, About Right?
	
	
	
	
		Resposta Selecionada: 
	
560/760
	Resposta Correta: 
	
560/760
	Feedback da resposta: 
	Correct! 560 is the total percentage of Females whose soda consumption is considered "About Right" and 760 is the total of all Females.  Great job!
	
	
	
 Pergunta 4 
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.
Based on the collected data, approximately what percent of self-employed individuals work between 47 and 63 hours per week?
	
	
	
	
		Resposta Selecionada: 
	
47.5%
	Resposta Correta: 
	
47.5%
	
	
	
 Pergunta 5 
1 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: 
	
21.5%
	Resposta Correta: 
	
21.5%
	Feedback da resposta: 
	Correct! You used Females and Too Many. Great job!
	
	
	
 Pergunta 6 
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 7 
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 8 
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 9 
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 10 
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