STAT 1000 EXAM 4 QUESTIONS AND 100%
CORRECT ANSWERS!!
what would be a population?
collection of objects we want information
example of population?
all students in high school
what is a sample?
part of the population which consist of units we actually examine to gather info
example of a sample?
population: all students in high school
sample: 100 students are reandomly selected
why do we use a sample
to use the inforamtion we learned from the sample and try to learn things about the population
what does sampling desing mean?
refers to how the sample was collected from the population
what is a voluntary response sampling?
when people make a choice if they want to participate
why is voluntary response sampling bad?
people with strong opinions will answer and those that don't care won't bother participating
example of voluntary response sampling?
online poles
customer reviews
, T/F are voluntary response sampling reliable?
False - unreliable
what is a convenience sample?
its a type of sample where they choose individuals who are easiest to reach
example of convenience sample?
Polling Friends or Classmates (instead of random people)
T/F are convenience sample reliable?
False - unreliable
so how do we make a sample not bias?
by selecting individuals by 'random' chance
simple random sampling?
has a size of N of N individuals
- every individual has an equal chance to be selected
simple random sampling example?
lottery draw
random number generator
stratified random sample?
when populations are naturally divided into groups
its not randomly selecting a sample
you also have to select a sample from every group
Strata?
groups of individuals that are similar in some way.
CORRECT ANSWERS!!
what would be a population?
collection of objects we want information
example of population?
all students in high school
what is a sample?
part of the population which consist of units we actually examine to gather info
example of a sample?
population: all students in high school
sample: 100 students are reandomly selected
why do we use a sample
to use the inforamtion we learned from the sample and try to learn things about the population
what does sampling desing mean?
refers to how the sample was collected from the population
what is a voluntary response sampling?
when people make a choice if they want to participate
why is voluntary response sampling bad?
people with strong opinions will answer and those that don't care won't bother participating
example of voluntary response sampling?
online poles
customer reviews
, T/F are voluntary response sampling reliable?
False - unreliable
what is a convenience sample?
its a type of sample where they choose individuals who are easiest to reach
example of convenience sample?
Polling Friends or Classmates (instead of random people)
T/F are convenience sample reliable?
False - unreliable
so how do we make a sample not bias?
by selecting individuals by 'random' chance
simple random sampling?
has a size of N of N individuals
- every individual has an equal chance to be selected
simple random sampling example?
lottery draw
random number generator
stratified random sample?
when populations are naturally divided into groups
its not randomly selecting a sample
you also have to select a sample from every group
Strata?
groups of individuals that are similar in some way.
