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# 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.
&quot;multiple choice&quot; 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?

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.
&quot;multiple choice&quot; 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?

The mean and IQR
Resposta Correta:

None of the above.

Pergunta 3
0 em 1 pontos

Skills: Identify subjects and variablesCategorical vs. quantitative.
&quot;multiple choice&quot; 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?

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 &quot;multiple choice&quot; question: select the correct answer.
What is the approximate median SSHA score for each gender?

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
&quot;multiple choice&quot; 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?

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
&quot;multiple choice&quot; question: select the correct answer. Which numbers would be used to convert to a percentage for Male, Not Enough?

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:
\u2022 Gender
\u2022 Year (Freshman, Sophomore, Junior, Senior)
\u2022 Number of missed classes
\u2022 Midterm score
\u2022 Extra credit (1 \u2013 Submitted, 2 \u2013 Not submitted)
\u2022 Final exam score
Skills: Understand the structure of a data set and identify different type of variables. Identify subjects and variables
&quot;multiple choice&quot; question: select the correct answer.
What are the individuals in this dataset?

The 55 students enrolled in the professor\u2019s class
Resposta Correta:

The 55 students enrolled in the professor\u2019s 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&quot;multiple choice&quot; question: select the correct answer.
The side-by-side boxplots below display the delivery time distributions (in minutes) of two pizza shops \u2013 \u201cBig Slice\u201d and \u201cCity Pizza\u201d
75% of Big Slice deliveries take:

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.
&quot;multiple choice&quot; question: select the correct answer. Based on the collected data 16% of self-employed individuals work less than how many hours per week?

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.
&quot;multiple choice&quot; 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?