PROBABILITY AND STATISTICS

PROBABILITY

In simple terms, probability simply refers to how likely something is to happen. If something has a low probability, it is unlikely to happen but if something has a high probability, it is likely to happen. Probability is commonly shown as a fraction.

FOR EXAMPLE:

Selecting one marble at random from a bag containing 4 blue marbles, 5 red marbles, 1 green marble and 2 black marbles. The probability of selecting a blue marble is 4/12 or written in its simplest form 1/3.

STATISTICS

Statistics in mathematics is a topic that deals with the study of collecting, analyzing, interpreting, presenting, and organizing data in a particular manner. Statistics is all about dealing with a large group of numbers that has to be sorted out.

UNDERSTANDING MEASURES OF CENTRAL TENDENCY (MEAN, MEDIAN, MODE, RANGE).

When working with numbers one should be able to find the central tendencies, here are the definitions of the tendencies:

1). Mean - To find the mean, you have to add up all the data points and divide it by the number of the data points.

2). Median - The median is the middle value in the dataset when the data points are arranged in ascending or descending order. If the dataset has an odd number of observations, the median is the middle number, but id the dataset has an even number of observations, the median is the average of the middle numbers.

3). Mode - Refers to the number that appears the most in the dataset.

4). Range - To find the range in the dataset, this is basically the difference between the biggest and the smallest number in the dataset.