Data
If a set of data is 'Quantitative' then what does that mean?
The data is numerical.
Name the 3 columns in a Frequency Distribution Table.
Score, Tally, Frequency.
In the below data set what is the Mode?
7, 8, 9, 11, 11, 11, 12, 14, 7, 7, 11, 7, 8, 7
7- occurs 5 times
What is the mean grade of the students in this class?
7
What 3 subject areas have I taught while at NLSC the last 3 weeks?
Maths, Science and HPE.
Hair colour data is qualitative. But is it Ordinal or Nominal?
Nominal- you cannot order hair colours.
Stem-and-leaf plots require a legend to be read correctly. Draw an appropriate legend for the following data set.
13, 14, 23, 54, 63, 43, 35, 29
Example: 2 I 3 = 23
What is the Range of the below set of data?
17, 24, 72, 34, 15, 32, 13, 81
Range = Highest - Lowest
= 81 - 13
= 68
Is height to the nearest cm continuous or discrete?
Discrete
What university am I studying at to recieve my teaching (secondary) degree?
QUT- Queensland University of Technology
What type of data is height?
Provide both quantitative/qualitative and discrete/continuous/ordinal/nominal.
Quantitative- Numerical
Continuous- Scaled
Draw a dot plot from the following data:
11, 14, 13, 15, 11, 15, 12, 13, 13, 14, 13
11, 11, 12, 13, 13, 13, 13, 14, 14, 15, 15
Dots above each other for repeats.
What is the Median of the below set of data?
9, 11, 31, 71, 43, 91, 32, 14, 82, 2
2, 9, 11, 14, 31, 32, 43, 71, 82, 91
There are 10 numbers. Therefore the median is the mean of the 2 middle numbers.
(31+32)/2 = 31.5
What does making a back-to-back stem and leaf plot entail? What is different to a normal stem and leaf plot?
Two leaf columns to seperate different types of data.
Why am I here at NLSC practicing to become a teacher?
Because I want to be a teacher. I enjoy helping people.
What is the definition of qualitative data?
Data that is non-numerical.
Name 5 different ways to display data.
Frequency Distribution Table, Bar Graph, Column Graph, Histogram, Pie Graph, Scatter Plot, Dot Plot, Stem-and-leaf plot, Box-and-whisker plot. There are too many to list all of them.
What is the mean of the below data? Show all working.
53, 23, 73, 81, 89, 41, 68, 20
Mean= (53+23+73+81+89+41+68+20)/8
= 56
How can you seperate two different types of data in a dot plot?
Either; two different colours for dots
or
one set of data above the line and one set of data below the line
How old am I?
Note* You must be within one year for the points.
Example- If you guess 32 and I am 33 you will still get the points. But if you guess 27 and I'm 30, no points.
I am 22 years old. 21 and 23 also get the points.
What is the definition of discrete data?
Provide an example.
Note* You must get both the definition and the example for any points.
Discrete data is counted in exact values.
Examples: Shoe size, goals scored in a football match, number of students absent from school.
Draw a back-to-back stem-and-leaf plot for the following data.
Age (boys)- 32, 22, 54, 73, 11, 53, 43, 39, 28
Age (girls)- 33, 25, 77, 51, 9, 51, 44, 67, 22
Left and right columns for boys and girls.
I hope you had a legend.
For the folling set of data, what is the most appropriate measure of centre?
Hair colour-
Blonde, Black, Brown, Red, Black, Black, Brown, Brown, Brown, Brown
Mode- the most common hair colour is Brown (5).
You cannot do the mean or median of a qualitative (non-numerical) set of data.
How can you calculate the mean for a set of data displaying hair colour?
E.g. Brown, Blonde, Red, Black, Brown, Black
You can't!
How to you spell my last name?
Bagnall