statistic1

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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
0 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 of exercise per week for 50 male college student:
What are appropriate numerical measures of center and spread in this case?
	
	
	
	
		Resposta Selecionada:
	 
 The mean and IQR
	Resposta Correta:
	 
None of the above.
	
	
	
Pergunta 3
0 em 1 pontos
	
	
	
	Skills: Identify subjects and variablesCategorical vs. quantitative.
"multiple choice" question: select the correct answer. Remember that a categorical variable is one that can be categorized, or put into types.
A quantitative variable is one that can be measured. Of the following variables, which ones are categorical? 
	
	
	
	
		Resposta Selecionada:
	 
Gender, Blood Pressure, Age, Types of Bears, Sunburn Types 
	Resposta Correta:
	 
Gender, Types of Bears, Locations, Sunburn Types
	
	
	
Pergunta 4
0 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 = 145, Males = 100 
	Resposta Correta:
	 
Females = 153, Males =114 
	
	
	
Pergunta 5
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 6
0 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 Male, Not Enough?
	
	
	
	
		Resposta Selecionada:
	 
73/110
	Resposta Correta:
	 
73/440
	
	
	
Pergunta 7
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 8
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. 
The side-by-side boxplots below display the delivery time distributions (in minutes) of two pizza shops – “Big Slice” and “City Pizza”
75% of Big Slice deliveries take: 
	
	
	
	
		Resposta Selecionada:
	 
More than 25 minutes
	Resposta Correta:
	 
More than 25 minutes
	Feedback da resposta:
	This is correct.
	
	
	
Pergunta 9
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 10
0 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:
	 
68%
	Resposta Correta:
	 
47.5%