Exam (elaborations)
stats 2300 ttu exam 1 with correct answers
- Course
- Stat 2300
- Institution
- Clemson University
stats 2300 ttu exam 1 with correct answers
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stats 2300 ttu exam 1 with correct answersStatistics is the science of - ** VERIFIED ANSWERS🔰 ✔✔collecting, organizing,
summarizing, analyzing information to draw conclusions or answer questions. It provides a
measure of confidence in any conclusion.
Collect: can tell a story
Organize and summarize: allows you to tell story
Analyze: tell different stories among data
Measure: Tell why result is best "evidence"
descriptive statistics - ** VERIFIED ANSWERS🔰 ✔✔statistics that organize and
summarize research data through numerical summaries, tables, graphs
ex: daily rainfalls
Likes on fb
(HOW ITS DESCRIBED)
inferential statistics - ** VERIFIED ANSWERS🔰 ✔✔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)
,sample - ** VERIFIED ANSWERS🔰 ✔✔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
population - ** VERIFIED ANSWERS🔰 ✔✔collection of ALL individuals or items under
consideration in a statistical study
(ALL AMOUNT)
Includes:
-greek letters
-unknown
Population vs. Sample - ** VERIFIED ANSWERS🔰 ✔✔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
, The document of American Attitudes about Genocide provided highlights of a nationwide
poll with 1000 participants. The survey revealed that "66% of respondents believe that
genocide is preventable"
1. Population?
2. Sample?
3. Statement in quotes Descriptive or inferential?
4. if statement had been "66% of americans believe genocide is preventable" Descriptive or
inferential? - ** VERIFIED ANSWERS🔰 ✔✔1. population: Americans
2. Sample: 1,000 ppl surveyed
3. Descriptive (describing results of survey)
4. Inferential (manipulating statement)
A nationwide survey of 1000 adults found that 50% of respondents favored a plan to break
up the 12 megabanks, which then controlled about 69% of the banking industry
1. Population?
2. Sample?
3. Is the percentage provided a descriptive statistic or an inferential statistic? - ** VERIFIED
ANSWERS🔰 ✔✔1. population: all adults in the country
2. sample: 1000 adults surveyed
3. descriptive statistic, since it summarizes information about how much of the sample
favors breaking up the megabanks.
observational study - ** VERIFIED ANSWERS🔰 ✔✔a study based on data in which no
manipulation of factors has been employed, simply only observes
-REVEAL ONLY ASSOCIATION
designed experiment - ** VERIFIED ANSWERS🔰 ✔✔researchers impose treatments and
controls and then observe characteristics and take measurements
-manipulates
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