Studied by 7 peoplePopulation
Everyone present
Sample
A portion of the population
Random sample
A group picked fairly from a larger population.
Inference
A prediction
Minimum
The smallest value in a set
Q1
The median of the lower half of a data set
Median
The middle number of a data set
Q3
The median of the upper half of a data set
Maximum
The largest value in a set
Mean
Average of a set of numbers
How do you find the mean?
Add all numbers, then divide by the count
Mode
The number that appears most frequently in a data set
Range
The difference between the highest and lowest values in a data set
Interquartile Range
The difference between the Q3 and Q1 in a data set
Variability
A way of describing how spread out the data is
Mean Absolute Deviation (MAD)
It's the average distance between each data point and the mean of the data set.
How to find the MAD?
1) Find the mean of the data set
2) Find the distance between the median and every other number
3) List the distances and find the average of them (Add all distances and divide by the count)
Note
Flashcard