unit 1 general maths hi, i’m ms mongan [email protected]
TRANSCRIPT
Quest
ionnair
e
Instructions:Please answer the following questions in
your book, on your own and without speaking. I will explain why at
the end
Prelim
inary
Q
uest
ion
Write down the time
you begin this questionnaire. Eg. 1:36pm
Quest
ion 1 1. Starting with
yourself, what are the
names of the people
sitting in your row (or
at your table)?
Quest
ion 2
2. State your approximate height in
metres.
Quest
ion 3
3. How many years old
do you think your teacher is?
Quest
ion 4
4. Please rate your dislike of mathematics
A) Very weakB) WeakC) ModerateD) StrongE) Very strong
Quest
ion 5
5. Which town do you
live in?
Quest
ion 6
6. Are you a morning
person or a night person?
Quest
ion 7
7. Would you rate yourself as:A) Above average
intelligenceB) Average intelligenceC) Below average intelligence?
Quest
ion 8
8. How many siblings
do you have?
Quest
ion 9
9. How long did it take
you to complete this
survey?
Types
of
Data
co
llect
ed
1.Names = Categorical, nominal
2.Height = Numerical, continuous
3.Age = Numerical, discrete
4.Dislike = Categorical, ordinal
5.Town = Categorical, nominal
6.Morning/Night= Categorical,
nominal7. Intelligence = Categorical,
ordinal8.Siblings = Numerical, discrete
9.Time = Numerical, continuous
Exercise 1A Categorical Data – Nominal or Ordinal? p5
Exercise 1A Numerical Data – Discrete or Continuous? p5
Frequency
D
istr
ibuti
on
Table
OK, we’ve collected the data. How do we
best represent it?
Frequency
Frequency: The number of times something occurs eg.
A particular piece of
data
This is a frequency distribution table
The question asks us to put the info into a bar chart…. ???????Picture it in your mind then draw a rough one.
What kind of data is this?
Exercise 1A - Representing Categorical Data p6
Gro
upin
g D
ata
Let’s say you collect a
whole heap of scores
(n________ data) It is sometimes
convenient to put it into groups.Can this be done with
categorical data?
What
do g
roups
look
like?
Groups (also known as
classes) are chosen by
you! It is just a range of numbersTry and form between 5
and 10 classes for your
dataEg. What percentage
signifies an A+ at WSC?
What about a C? UG?
Spot the differences! I mean, compare and contrast…
My favourite word for today: Polygon
Another awesome word: Distribution
Normal Distribution- most common score in the centre. Symmetrical.
Skewed Distribution – look at where it has been dragged
Bimodal distribution – Bi = twomode = score than occurs the most
SummaryTypes of Data
Representing Data
Types o
f Data
Categorical
Nominal
Ordinal
Numerical
Discrete
Continuou
s
How
do y
ou
repre
sent
Cate
gori
cal D
ata
?
Bar chartEg.
How
do y
ou r
epre
sent
Num
eri
cal D
ata
?
(Gro
uped a
nd u
ngro
uped)
Histogram and PolygonEg.
Text Book1B – Q1, 4, 8, 12