Exam (elaborations)
Test Bank for Essential Statistics Exam #1 (7th edition by Mario F. Triola)
- Course
- Institution
Test Bank for Essential Statistics Exam #1 (7th edition by Mario F. Triola)
[Show more]
Content preview
Test Bank for Essential Statistics Exam#1 (7th edition by Mario F. Triola)
Data - ANSConsists of information coming from observations, counts, measurements, or
responses.
Statistics - ANS*The science of collecting, organizing, analyzing, and interpreting data in order
to make decisions
*Derived from the Latin word "status" meaning state involves more of counting births & deaths
*Divided into 2 fields (descriptive & inferential)
Data sets - ANSTwo types used to study in statistics:
-population
-samples
Data Set Examples:
In a survey, 614 small business owners in the US were asked whether they thought their
companys FB presence was valuable. 258 of the 614 said yes.
What is the population and sample & describe the sample data set? - ANSThe population
consists of the responses of all small business owners in the US.
The sample consists of the 614 responses of the small business owners in the survey.
**The sample is a subset of responses of business owners in the US...the sample data set
consists of 258 "yes" owners & 356 owners who said "no"
Data Set Examples:
A survey of 1015 U.S. adults found that 32% have had to put off medical care for themselves or
their family in the past year due to cost. What are the data sets? - ANSPopulation: results from
all adults in U.S.
Sample: results from the 1015 U.S. adults included in the survey
Sample - ANSA set of observations drawn from the population of interest. It should be a
representative of a population. Random sampling is best. Used in Inferential.
Sample Example:
A survey of 500 spectators from a stadium with 42,000 spectators...what is the sample? -
ANSThe survey of 500 spectators is a sample bc it is a subset, or part, of the population of
42,000 spectators at the stadium
Parameter Example:
,In January 2013, 60% of the governors of the 50 states in the USA were republicans. What is
the Parameter? - ANSThe 60% is the PARAMETER. It is the numerical description of the total
number of governors
Statistic Example:
The average annual salary for 35 of a company's 1200 accountants is $68,000. What is the
Statistic? - ANSThe $68,000 is a STATISTIC. It is a numerical description of a sample of annual
salaries
Descriptive Stats Example:
A survey of 202 pilots found that 20% admit that they have made a serious error due to
sleepiness. What is the descriptive statistic? - ANSThe statement "20% admit that they have
made serious errors due to sleepiness" is a descriptive statistic.
Inferential Statistics Example:
An inference is drawn from the sample is that "an association exists between sleepiness and
pilot error." - ANSMaking this inference is an example of inferential stats
Qualitative - ANSAttributes, lables, or nonnumerical entries
EX: eye colors of models since eye color is a nonnumerical attribute
Quantitative (N) - ANSNumerical measurements or counts
EX: heights of hot air balloons
How is a sample related to a population? - ANSa sample is a subset of a population
T or F:
A statistic is a measure that describes a population characteristic? - ANSFalse, a statistics is a
measure that describes a sample characteristic
T or F:
A population is the collection of someoutcomes, responses,measurements, or counts that are
of interest. - ANSFalse. A population is the collection of alloutcomes, responses,
measurements, or counts that are of interest.
Population or sample:
the salary of each teacher in a school - ANSpopulation, because its a collection of salaries for
all teachers in the school
Population or sample:
, ages of one person per row in a cinema - ANSsample, because the collection of ages of one
person per row is a subset of all the ppl in the cinema
Population or sample:
the age of each member of the Senate - ANSPopulation, bc its a collection of ages for all
members of the senate
In apoll, 1,001 adults in a country were asked whether they favor or oppose the use of"federal
tax dollars to fund medical research using stem cells obtained from humanembryos." Among
therespondents, 46% said that they were in favor.
What is the population and sample in the givenproblem? - ANSpopulation: all adults in the
country
sample: the 1,001 adults selected
The Gallup Organization contacts 2791 female university graduates who have a white collar
jobs and asks whether or not they had received a raise at work during the past 6 months
what is the population & sample? - ANSpopulation: Female university graduates who have a
white collar job
sample: the 2791 female university graduates that have a white collar job
A study of 6,076 adults in public rest rooms found that 23% did not wash their hands before
exiting.
is 23% a parameter or statistic?? - ANSstatistic
Following the election, 18% of the governors of the 50 United States were female
is 18% a parameter or statistic?? - ANSparameter
Two students in a class of 29 have red hair
is two a parameter or statistic? - ANSparameter, because the data set of all 29 students is a
population
Suppose a survey of 510 women in the United States found that more than 58% are the primary
investor in their household. Which part of the survey represents the descriptive branch of
statistics? Make an inference based on the results of the survey - ANSdescriptive statistic: 58%
of women in the sample are the primary investor in their household.
inferential statistic: 58% of women the sample are the primay investor's in their houshold..
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 AllLegitExams. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
80364 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now
