Mathematics Statistical Terms Flashcards
1
Q
Mode
A
- Most common or most reoccurring number in a data set.
- The mode is the item that occurs the most often in a data set
2
Q
Mean
A
- Sum of values divided by number of values.
- The mean is the most commonly used average
- To calculate the mean of a set of values, we add together the values and divide by the total number of values
3
Q
Median
A
- Middle value
- The median is the middle number when all numbers are in order
4
Q
Range
A
- Largest value minus the smallest value
- The lowest score subtracted from the highest score is called the range
- If the scores are spread out, then the range will be higher, and the scores less consistent
- If the scores are close together than the range will be lower and the scores more consistent
5
Q
Outliers
A
Very unusual results are called outliers
6
Q
Skewed data
A
- Data that is heavily weighted towards one end of the data set is said to be skewed
- When data is skewed, the mode is not an appropriate value
7
Q
Interquartile range
A
- The interquartile range is the range of the middle half of the data
- Interquartile range = upper quartile - lower quartile
8
Q
Lower Quartile
A
The lower quartile is the data value that is a quarter of the way along the list
9
Q
Upper Quartile
A
The upper quartile is the data value that is three quarters of the way along the list
10
Q
Categorical data
A
Non-numerical using labels of categories
11
Q
Numerical data
A
Numerical using numbers
12
Q
Types of categorical data
A
- Nominal
- Ordinal
13
Q
Types of numerical data
A
- Discrete
- Continuous
14
Q
Continuous data
A
- It can take on any value in an interval
- “Measured”
15
Q
Discrete data
A
- It can only have specific values
- “Counted”
