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This lab allows students to practice and demonstrate techniques used to generate systematic samples. Students will have the opportunity to create relative frequency tables and interpret results based on different data groupings.

Class Time:


Student learning outcomes

  • The student will demonstrate the systematic sampling technique.
  • The student will construct Relative Frequency Tables.
  • The student will interpret results and their differences from different data groupings.

Movie survey

Ask five classmates from a different class how many movies they saw last month at the theater. Do not include rented movies.

  1. Record the data
  2. In class, randomly pick one person. On the class list, mark that person's name. Move down four people's names on the class list. Mark that person's name. Continue doing this until you have marked 12 people's names. You may need to go back to the start of the list. For each marked name record below the five data values. You now have a total of 60 data values.
  3. For each name marked, record the data:
    ______ ______ ______ ______ ______ ______ ______ ______ ______ ______
    ______ ______ ______ ______ ______ ______ ______ ______ ______ ______
    ______ ______ ______ ______ ______ ______ ______ ______ ______ ______
    ______ ______ ______ ______ ______ ______ ______ ______ ______ ______
    ______ ______ ______ ______ ______ ______ ______ ______ ______ ______
    ______ ______ ______ ______ ______ ______ ______ ______ ______ ______

Order the data

Complete the two relative frequency tables below using your class data.

Frequency of number of movies viewed
Number of Movies Frequency Relative Frequency Cumulative Relative Frequency
Frequency of number of movies viewed
Number of Movies Frequency Relative Frequency Cumulative Relative Frequency
  1. Using the tables, find the percent of data that is at most 2. Which table did you use and why?
  2. Using the tables, find the percent of data that is at most 3. Which table did you use and why?
  3. Using the tables, find the percent of data that is more than 2. Which table did you use and why?
  4. Using the tables, find the percent of data that is more than 3. Which table did you use and why?

Discussion questions

  1. Is one of the tables above "more correct" than the other? Why or why not?
  2. In general, why would someone group the data in different ways? Are there any advantages to either way of grouping the data?
  3. Why did you switch between tables, if you did, when answering the question above?

Questions & Answers

anyone know any internet site where one can find nanotechnology papers?
Damian Reply
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Collaborative statistics using spreadsheets - snackeru. OpenStax CNX. Jul 09, 2015 Download for free at http://legacy.cnx.org/content/col11842/1.1
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