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Test Bank for Essential Statistics Exam #1 (7th edition by Mario F. Triola)
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Test Bank for Essential Statistics Exam #1 (7th edition by Mario F. Triola)
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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..
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