MATH 10 quarter 4

• Statistics

  refers to the science that deals with the collection, tabulation or presentation, analysis, and interpretation of numerical or quantitative data.
• Collection

  data refers to the process of obtaining numerical measurements.
• Tabulation/ presentation

  a process of organizing data into tables, graphs, or charts.
• Analysis

  process of extracting from the given data the relevant information from which numerical description can be formulated.
• Interpretation

  refers to the task of drawing conclusions from the analyzed data.
• Descriptive statistics

  collection of summarizing values to describe group characteristics of the data.
• Inferential statistics

  • You take data from samples and generalize about a population.
• Population (N)

  • refers to the totality of objects
• Sample (n)

  • part of a population
  • subset of pop
• Parameter

  the characteristics of a population which is measurable.
• Data

  are statistical facts, historical facts, principles, opinions, and items of various sources.
• Quantitative data

  refers to the numerical information obtained from counting or measuring
• Qualitative data

  refers to the descriptive attributes that cannot be subjected to mathematical operations
• Variable

  is a characteristic or a phenomena which may take on different values
• Discrete variable

  is a variable that can be obtained by counting
• Continuous Variable

  is a variable that can be obtained by measuring objects or attributez
• Measures of Central Tendency

  any measure indicating the center of a data set
• Mean

  • also known as the average
  • the most popular among the measures of central tendency
  • It is affected by extreme values.
• Median

  
  

  the middle value in a set of quantities

  • It separates an ordered set of data into two equal parts
• Steps to find the median in an ungrouped data

  1. Identify the number of quantities from the given data set.
  2. Arrange the scores in ascending order or descending order.
• Mode

  • measure or value which occurs most frequently in a set of data.
• unimodal distribution

  it contains only one mode.
• bimodal distribution

  it contains two modes.
• No mode

  If all the numbers appear the same number of times