Flashcards
Representation of sample data
Flashcards do conjunto (14)
- 1What are the 4 main variables?Qualitative variables
Quantitative variables
Continuous variables
Discrete variables - 2Differentiate between qualitative and quantitative variables?Qualitative is Non-numerical whereas quantitative is numerical.
- 3Differentiate between continuous and discrete?For continuous variables, any value within a given range can be taken.
For discrete variables, only certain values can be taken. - 4What are the common examples of continuous and discrete variables?Continuous variables
height, time, age
Discrete variables
shoe size, cost in £ and p, number of coins - 5What is a frequency table?A list of discrete values (x) and their frequencies.
- 6What is the important fact to be considered when deciding class boundaries?There must be no gaps between the classes regardless if the data is continuous or discrete.
- 7Give an example where there are no gaps in discrete data
- 8How can the class boundaries for continuous distributions be placed?The class boundaries can be placed anywhere
- 9What are the prerequisite steps for plotting a histogram?draw up a table showing the:
•class intervals
•class boundaries
•class width
•frequency
•height - 10How can the height be calculated?Height = Frequency/class width
- 11How can histograms be plotted?Plot the axes with a continuous scale as normal graphs.
There are no gaps between the bars of a histogram. - 12Give an example of a histogram table
- 13What is significant about the area of a single histogram bar?•The area of that bar represents the frequency of that class.
- 14What is significant about the total area of a frequency historgram?Represents all the items.
Informações
- Descrição
- A-Level Maths FlashCards sobre Representation of sample data, criado por Jio Jenassi em 18-02-2016.
- Criado por
- Jio Jenassi
- Visualizações
- 1
- Avaliação