Intro to Statistics
Questions 1-5 are related to the following information: At the beginning of the semester, an Intro to Statistics instructor asked the 225 students enrolled in the class to complete a survey. For each student, the instructor collects information about the following: Sport (Favorite sport: Football, Baseball, Basketball, Hockey, Other) Exercise (How many minutes do you spend exercising per week) Personality (on a 0-25 scale, how would you describe your personality 0=total introvert, 25=total extrovert) Death penalty (Strongly agree, Agree, Neutral, Disagree, Strongly Disagree)
What are the individuals in this example? The students enrolled in Intro to Statistics Correct--Individuals are the people/objects that information is collected on. Therefore, in this case, the individuals are the 225 students enrolled in the Intro to Statistics course.
Questions 1-5 are related to the following information: At the beginning of the semester, an Intro to Statistics instructor asked the 225 students enrolled in the class to complete a survey. For each student, the instructor collects information about the following: Sport (Favorite sport: Football, Baseball, Basketball, Hockey, Other) Exercise (How many minutes do you spend exercising per week) Personality (on a 0-25 scale, how would you describe your personality 0=total introvert, 25=total extrovert) Death penalty (Strongly agree, Agree, Neutral, Disagree, Strongly Disagree)
How many variables are in this example? 225 Correct. The variables are the characteristics/pieces of information that are collected on the individuals. In this case, there are therefore 4 variables: Sport, Exercise, Personality, and Death penalty.
Questions 1-5 are related to the following information: At the beginning of the semester, an Intro to Statistics instructor asked the 225 students enrolled in the class to complete a survey. For each student, the instructor collects information about the following: Sport (Favorite sport: Football, Baseball, Basketball, Hockey, Other) Exercise (How many minutes do you spend exercising per week) Personality (on a 0-25 scale, how would you describe your personality 0=total introvert, 25=total extrovert) Death penalty (Strongly agree, Agree, Neutral, Disagree, Strongly Disagree)
What kind of variable is Personality? Interval Correct. Personality is an interval variable since the value of 0 does not mean "no personality" but rather it means total introvert.
Questions 1-5 are related to the following information: At the beginning of the semester, an Intro to Statistics instructor asked the 225 students enrolled in the class to complete a survey. For each student, the instructor collects information about the following: Sport (Favorite sport: Football, Baseball, Basketball, Hockey, Other) Exercise (How many minutes do you spend exercising per week) Personality (on a 0-25 scale, how would you describe your personality 0=total introvert, 25=total extrovert) Death penalty (Strongly agree, Agree, Neutral, Disagree, Strongly Disagree)
What kind of variable is Sport? Nominal Correct. Sport is a categorical variable where the possible values do not have a natural order and therefore it is nominal.
Questions 1-5 are related to the following information: At the beginning of the semester, an Intro to Statistics instructor asked the 225 students enrolled in the class to complete a survey. For each student, the instructor collects information about the following: Sport (Favorite sport: Football, Baseball, Basketball, Hockey, Other) Exercise (How many minutes do you spend exercising per week) Personality (on a 0-25 scale, how would you describe your personality 0=total introvert, 25=total extrovert) Death penalty (Strongly agree, Agree, Neutral, Disagree, Strongly Disagree)
Which of the following variables is not a ratio variable? Temperature (Outside temperature) Correct. Temperature is an interval variable. Temperature = 0 does not mean that "there is no temperature" (in fact, there is no such thing). Temperature = 0 means that it is very cold that day.
Questions 1-5 are related to the following information: At the beginning of the semester, an Intro to Statistics instructor asked the 225 students enrolled in the class to complete a survey. For each student, the instructor collects information about the following: Sport (Favorite sport: Football, Baseball, Basketball, Hockey, Other) Exercise (How many minutes do you spend exercising per week) Personality (on a 0-25 scale, how would you describe your personality 0=total introvert, 25=total extrovert) Death penalty (Strongly agree, Agree, Neutral, Disagree, Strongly Disagree)
Which of the variables above is ordinal? Death penalty Correct. In this example, Death penalty is an ordinal variable since the possible values are naturally ordered from strong agreement to strong disagreement.