STATS&PROB
It is a branch of mathematics that deals with the collection, analysis and interpretation of data.
Statistics
A group or set of subjects under the study.
Population
Proper subset of a group that can be used to represent the group.
Sample
A characteristic that can be measured and take on different values.
Variable
A number describing a whole population.
Parameter
A type of quantitative variable that can take on a countable number of distinct values.
Discrete
Characterized by data that consists of names, labels, or categories only.
Nominal
It is a numerical description of how likely an event is to occur or how likely it is that a proposition is true.
Probability
It is the result of a single trial.
Outcome
Any subset of the sample space.
Values are ordered, have equal intervals, and meaningful differences can be measured. However, it lacks a true zero, so zero does not mean "none" of the quantity.
Interval
Give me 4 types of random sampling technique
1.RANDOM SAMPLING/LOTTERY SAMPLING
2.SYSTEMATIC SAMPLING
3.STRATIFIED SAMPLING
4.CLUSTER SAMPLING
What is the probability formula?
Probability = (number of favorable outcomes)/(Total of possible outcomes)
Give me 4 types of Non-Random Sampling Technique
1. QUOTA SAMPLING
2. CONVINIENCE SAMPLING
3. PURPOSIVE SAMPLING
4. SNOWBALL SAMPLING
Where values are ordered, have equal intervals, and also include a true zero point.
Ratio
Normal Distribution can also be called ____________ and _______________.
Gaussian Curve and Normal Curve
The average score of the group of students is 35 and has a standard deviation of 3.8, what would be the z-score if the given score is 31.2?
-1
If the curve is shaded has an area of 0.75, then what is the area of the remaining side?
0.25
The average score of the group of students is 35 and has a standard deviation of 3.8, what would be the score 3 standard deviations to the right of the mean?
46.4
The average score of the group of students is 35 and has a standard deviation of 3.8, what would be the z-score if the given score is 30?
-1.32