Atividade statistics 1

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Atividade - Statistics 1
Pergunta 1
1 em 1 pontos
	
	
	
	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?
	
	
	
	
		Resposta Selecionada:
	 
The 55 students enrolled in the professor’s class
	Resposta Correta:
	 
The 55 students enrolled in the professor’s class
	
	
	
Pergunta 2
1 em 1 pontos
	
	
	
	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?
	
	
	
	
		Resposta Selecionada:
	 
Extra credit (1 – Submitted, 2 – Not submitted)
	Resposta Correta:
	 
Extra credit (1 – Submitted, 2 – Not submitted)
	Feedback da resposta:
	This is correct.
	
	
	
Pergunta 3
1 em 1 pontos
	
	
	
	Skills: Compare distributions
Identify subjects and variables
Interpret boxplots "multiple choice" question: select the correct answer. 
What is the approximate median SSHA score for each gender? 
	
	
	
	
		Resposta Selecionada:
	 
Females = 153, Males =114 
	Resposta Correta:
	 
Females = 153, Males =114 
	Feedback da resposta:
	Correct! You would use the horizontal line in each box to estimate the median. Good job!
	
	
	
Pergunta 4
1 em 1 pontos
	
	
	
	Skills: Compare distributions
Identify subjects and variables
Interpret boxplots
"multiple choice" question: select the correct answer. 
Which gender has a larger range of SSHA scores? 
	
	
	
	
		Resposta Selecionada:
	 
Males
	Resposta Correta:
	 
Males
	Feedback da resposta:
	Correct! Since the boxplot for the males is taller from top to bottom as compared to the females, it has a larger range. Great job! Way to go!
	
	
	
Pergunta 5
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 6
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 7
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%
	
	
	
Pergunta 8
0 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:
	 
55
	Resposta Correta:
	 
39
	
	
	
Pergunta 9
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 10
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!