Studied by 30 people
Stat
Discrete Data
Data that can be counted
Continuous Data
Data that can be measured
Different types of averages
Mean, Median, Mode
Mean
Average of a set of numbers
How to calculate Mean
Add all values together and divide by number of values
Mode
Most common number in a set of values
Range
Highest number minus lowest number
Sigma sign
The sum of
Line of best fit
A straight line that best represents the data on a scatter plot
Standard Deviation
Average distance any given point is away from the mean
Large Standard Deviation:
Points aren’t close to mean
Small Standard Deviation:
Points are close to the mean
Variability
How spread out data is
When can you use SD?
Symmetrical Data
Outlier
Data point that doesn’t fit the general trend of data
What is any point considered if it isn’t in the first three levels of SD?
Outlier
Histogram
For continuous data
Bar Chart
For discrete data
Quartiles
Divide data equally into four groups each worth 25%
IQR (interquartile range)
Q3 - Q1
Cumulative Frequency
Sum of all frequencies up to a particular value
Systematic Sampling
Sampling Method where elements are selected at regular intervals from a sorted list
Convenience Sampling
Non-probability sampling method where samples are selected based on easy availability and proximity to researcher
Random Sampling
Type of probability sampling in which the researcher randomly selects a subset of participants from a population
Quota Sampling
Non-probability sampling method that relies on the non-random selection of a predetermined number or proportion of units, exclusive groups
Stratified Sampling
Type of sampling method in which the total population is divided into smaller groups or strata to complete the sampling process
