STATSTISTICS 1

• A random variable, which is usually written using capital

  letters, is a variable that assigns a numerical value to each

  outcome of a random event. It can be classified as discrete or

  continuous.
• A discrete variable is a variable whose value is obtained

  through counting. It takes on countable numbers of distinct

  values which are whole numbers such as, 0, 1, 2, 3, 4, 5, …
• A continuous variable is a variable whose value is obtained

  through measurement. It assumes an infinite number of

  possible values including the decimals between two counting

  numbers.
• A random variable is a variable whose value is dependent

  to the outcome of a well-defined random event or

  experiment
• The sample space is the set of all possible outcomes in an

  experiment.
• The possible values of a random variable are values that

  are obtained from functions that assign real number to each

  point of a sample space.
• A discrete probability distribution or a probability mass

  function consists of the values a random variable can assume
• STATISTICS- the science that deals with the collection , classification , analysis and interpretation of numerical facts of data
• PROBABILITY -the branch of mathematics that studies the posible outcomes of given outcomes relative likehoods and distribution
• PROBABILITY - it means the chance that a particular event will occur expressed on a linear scale from (imposibility) to 1( certainly)
• DISCREATE - countable / it has special number
• CONTINOUS - uncountable

  ex : weight , water " can measure "