# 1.10 Sampling and data: using spreadsheets to view and summarize  (Page 6/6)

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## Optional classroom exercise:

At your computer, try this exercise: (1) Open the file, Statistics First Day of Class Survey that you worked on previously (2) create a new worksheet tab and label it Frequency Distributions Categorical Data, and another worksheet tab and label it Frequency distributions Quantitative Data; (3) open the file in Google Spreadsheet or Excel; (4) pick a column of data that is categorical and has been “cleaned” and create a countif frequency chart with all the appropriate labels for rows and columns. And (5) save the file again and post in the appropriate Moodle assignment.

## Pivot chart or pivot table:

An alternate process for creating a frequency, relative frequency, and commulative relative frequency chart can be achieved by using a pivot chart or pivot table. A pivot table is a data visualization and summarization tool found in most spreadsheets. It is a quick way to create tables, either horizontal or vertical thereby a “pivot table”. We will use pivot tables particularly when we look at bi-variate data, since we will want to summarize data taking in account the contributions of two variables. For right now we are only interested in summarizing one variable so the directions are simplified.

One can create a pivot chart or table to display frequency, relative frequency, and cumulative relative frequency. When using the pivot function in Google or Excel, one only has to select the column one wants to summarize and then decide “how” the data will be presented. We will create a pivot table using the same column of data, “How did you arrive on campus today?” We will present a pivot table in Google Spreadsheet first and then in Excel.

## Frequency Distribution for Quantitative Data :

One can create a frequency distribution for quantitative data using the above techniques. One will need to create categories for the frequency distribution. In the next chapter we will discuss processes for creating these categories. In this chapter you will just be counting the data that fits the criteria listed. So using the countif principles with criteria for the groups (=countif(cell range, criteria) or such as =COUNTIF(H1:H12, "<=30") for counting all the students who have 30 or less credit hours, then =COUNTIF(H\$1:H\$12, ">30") - COUNTIF(H\$1:H\$12, ">60") to count all the student who have 31 to 60 credit hours, etc. Note that the criteria follows the cell addresses. There is a comma between the cell range and the criteria. The criteria are encapsulated in quotation marks.

## Optional classroom exercise:

At your computer, try this exercise: (1) Open the file, Statistics First Day of Class Survey that you worked on previously; (2) open the file in Google Spreadsheet or Excel; (3) Go to your tab labeled Frequency Distributions Quantitative Data; (4) pick column of data that is quantitative and has been “cleaned” and create a countif frequency chart with all the appropriate labels for rows and columns. And (5) save the file again and post in the appropriate Moodle assignment.

## Optional creative activity – horizontal dot plot for quantitative data:

A horizontal dot plot can be created by using your frequency table and creating one more column and using the repetition formula =REPT(“criteria”, count) so if you want to create a dot plot you will repeat ● and you can use the count in your frequency column. If I was doing the frequency for the number of credit hours completed the formula would be ‘Rept(“●”, d25). I would then copy and paste this formula down to the end of my frequencies. And end up with the picture below. To find the ●symbol, go to the insert tab on your ribbon. Pick symbol from the most right block on the insert tab ribbon. Click on the down arrow for symbols. Pick more symbols. Under the recently used symbols you will find a box for character code. Enter the character code 25cf for a black dot. We will use a wide dot for other graphs and its character code is 25cb

where we get a research paper on Nano chemistry....?
what are the products of Nano chemistry?
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
I only see partial conversation and what's the question here!
what about nanotechnology for water purification
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
why we need to study biomolecules, molecular biology in nanotechnology?
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
why?
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
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