Sampling Methods MATH225N
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1. Matthew wants to estimate the mean height of stu- dents
attending his college. He records the heights of 100
randomly selected students attending the college. What is the
population?
2. A is an element, feature, or factor of the popula- tion that
can be qualified or quantified. are
the values or categories of variables.
3. Susan wants to estimate the mean number of siblings for
each student in her school. She records the number of siblings
for each of 200 randomly selected students in the school.
What is the population?
all the students at-
tending the college
1. Variables
2. Data Values
all the students in
the school
4. Raymond wants to estimate the percentage of parents * the 200 people
who use cloth diapers. He asks a randomly selected group
of 200 parents whether or not they use cloth diapers.
What is the data?
surveyed
For second ques-
tion. ... specific
"YES!" or "no" re-
sponses to the sur- vey
5. Example 1 You want to de-
termine the overall
grade point aver-
age (GPA) at your
school. There are
1800 students at
your school. Since
you want to col- lect
data about all of the
students, all 1800
students is the
population. The
variable is over-
all GPA at your
school.
But, it would be dif-
ficult to ask every
