Chapter 3 - Describing Data, Numerical Measures Flashcards
1
Q
Measure of Central Tendency
A
A single value that summarizes a set of data
2
Q
Arithmetic Mean
A
Calculated by summing the values and dividing by the number of values. It can be considered as the balancing point for a set of data.
Ex. Population Mean formula
3
Q
Parameter
A
A measurable characteristic of a population
Ex. Uses the entire population
4
Q
Statistic
A
A measurable characteristic of a sample.
Ex. Only uses a sample of the entire population.
5
Q
Weighted mean
A
Value of each observation is multiplied by the number of times it occurs. The sum is then divided by the total number of observations.
6
Q
Median
A
The midpoint of the values after they have been ordered from smallest to largest.
7
Q
Mode
A
The value of the observation that appears most frequently.
