Stats 2300 Exam 1 – Texas Tech University

Stats 2300 Exam 1 – Texas Tech
University.






, Stats 2300 Exam 1 – Texas Tech
University.
1. Statistics is the science of collecting, organizing, summarizing, analyzing
information
to draw conclusions or answer questions. It provides
a mea- sure of confidence in any conclusion.

Collect: can tell a story
Organize and summarize: allows you to tell
story Analyze: tell ditterent stories
among data Measure: Tell why result is
best "evidence"

2. descriptive statistics statistics that organize and summarize research data
through
numerical summaries, tables, graphs

ex: daily rainfalls
Likes on fb

(HOW ITS DESCRIBED)




3. inferential statistics using methods that take results from a SAMPLE,
extends
them to the POPULATION, and measures the RELIABILITY
OF RESULT

Ex: inferring political winner from sample
poll est avg SAT score sample

(ALWAYS INVOLVED WITH ACTION, ALLOWS TO
MAKE AN INFERENCE)




, Stats 2300 Exam 1 – Texas Tech
University.
4. sample a subset of the

population (SOME

AMOUNT)

Includes:
-alphabetical letters (x,y,z,p)
-mostly found from data then used to make and
inference about population

5. population collection of ALL individuals or items under
consideration in a statistical study

(ALL AMOUNT)

Includes:
-greek letters
-unknown

6. Population vs. Sample A population includes all of the elements from a set of
data.
-(Greek Letters, Unknown "Fake random sample")

A sample consists of one or more observations from
the population.
-(Alphabetic letters, found from data then used to make
"inference about population")

Fake random sample vs infer about pop (mutual
relationship






, Stats 2300 Exam 1 – Texas Tech
University.


7.