Statistics Introduction Questions with Verified Answers
5 views 0 purchase
Course
Introduction to Statistics
Institution
Introduction To Statistics
Variables - A characteristic (of a person, place, or thing) that takes on different values (achievement, attitude, knowledge, etc.)
Types of variables - Quantitative (Numerical) and Qualitative (Categorical
Quantitative Variable - Represent differing amounts of the characteristic (age, int...
Statistics Introduction Questions with
Verified Answers
Variables - ✅✅ A characteristic (of a person, place, or thing) that takes on
different values (achievement, attitude, knowledge, etc.)
Types of variables - ✅✅ Quantitative (Numerical) and Qualitative (Categorical
Quantitative Variable - ✅✅ Represent differing amounts of the characteristic
(age, intelligence, or run time, etc.)
Qualitative Variable - ✅✅ Represent differing kinds rather than amounts (gender,
marital status, or breed of dog, etc.)
Continuous Variables - ✅✅ Variables that can take on any value (number of free
throws made, GRE score, or number of students in class)
Discrete Variables - ✅✅ Variables that can take a finite number of values (marital
status, gender, or a year in school)
Dichotomous variable - ✅✅ either male or female
Univariate Data - ✅✅ When a study involved studying only one variable (speed)
Bivariate Data - ✅✅ When a study involves studying two variables
simultaneously (strength and throwing distance)
Purpose four levels of measurement - ✅✅ Help the research determine what types
of statistical analyses are appropriate for a given set of data
Nominal Scale - ✅✅ (Names) Values merely name the category to which the
object under study belongs, interpretations are limited to statements of kind rather
than amount (Italian, Irish...)
Ordinal Scale - ✅✅ Outcomes can be ordered or ranked to reflect differing
degrees or amounts of the characteristic being studied (first vs. Second vs. Third)
Does not give info about the difference between first and second, second and third
, Interval Scale - ✅✅ Value assigned is based on some underlying continuum that
has equal intervals (The 2-point difference between 3 and 5 and 7 and 8, drop in
temp from 30℃ to 10℃ same as 50℃ to 30℃) (Includes meas. of aptitude,
achievement, or attitude) Social Sciences
Parametric statistical techniques - ✅✅ underlying distributions assumed to be
normal
Statistics - ✅✅ A set of tools and techniques that are used for describing,
organizing, and interpreting information or data
Example of statistics - ✅✅ Number of students in a particular curriculum speed of
problem-solving, or average cost of dinner
Purpose of statistics - ✅✅ Making decisions with incomplete data
Data - ✅✅ A record of an observation or an event such as a test score, grade in a
class, or response time, one
Data Set - ✅✅ A collection of observations or events such as test scores, grades
on a test, or response times
Descriptive statistics - ✅✅ Used to organize and describe the characteristics of a
collection of data; measures of central tendency (CT) and measures of variability
Inferential statistics - ✅✅ Used to make generalizations from a smaller group of
subjects (a sample to a larger group of subjects (a population); won't have access to
the entire population
Population - ✅✅ A group of people that have at least one characteristic in
common (all aggies)
Sample - ✅✅ A subset of a population (certain subset of aggies)
Statistic - ✅✅ A summarized value of a sample (average age of aggies)
Parameter - ✅✅ A summarized value of a population (average age of the entire
population of aggies)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller kharowl. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.39. You're not tied to anything after your purchase.
