Data Handling Chapter 3 - Paper 1 Flashcards
What are bar of pie graphs?
A means of showing components within a pie chart.
What is bias?
Selectivity in a sample that affects distribution.
What are class intervals?
Intervals into which the range of the variable of a distribution is divided.
What are line graphs?
A diagram used to display data with a consistent trend.
What are measures of central tendency?
A summary of data using range, quartiles and percentiles.
What are multiple bar graphs?
Graphs that contain multiple vertical bars for each category of data, with each bar representing a different component of each category of the data.
What is a percentage distribution?
Data represented as a percentage of the whole.
What is population?
The entire group from which samples are drawn.
What is a sample?
A set of items selected from a population for analysis.
What are vertical stack graphs?
Categories are represented as bars, but the bars are composed of series that are “stacked” on top of each other, with each series representing its value.
What is a repetition rate?
Percentage of learners repeating a grade.
What is a pie chart?
A pie chart consists of sectors. Each sector represents a category of the data (e.g. a day of the week).
How do you calculate the mean of a data set?
Mean = Sum of all the values in a data set divided by the total number of the values in the data set.
What is the median of a data set?
It is the middle most value in a data set when the values are arranged in ascending or descending order.
What is the mode of a data set?
It is the value or object that occurs most in a data set.
What do measures of central tendency give us?
They each give us an average for a data set.
What is a box-and-whisper plot?
A diagram showing minimum and maximum values, median and inter-quartile range.
What are growth charts?
Graphs consisting of a series of percentile curves that show the distribution of growth measurement of children.
What is inter-quartile range?
The difference between quartile 1 and quartile 3.
What are measures of spread?
A summary of data using range, quartiles and percentiles.
What are percentiles?
Dividing data into 100 equal groups each representing 1% of the data.
What are quartiles?
Dividing data into 4 equal groups each representing 25% of the data.
