Q4-LESSON-5.1-INTRODUCTION-TO-STATISTICS.pptx

Math lesson 5.1

1. LESSON 5.1 Introduction of Statistics. Quarter 4 WEEK 1 Hi! ¡Hola!

2. Collection of Data Methods What is STATISTICS? Organizing Data Presentation of Data Analyzing Data Interpretation of Data

3. What is STATISTICS? Statistics is a science that deals with the methods of collecting, organizing, presenting, analyzing, and interpreting data in such a way that valid conclusions can be drawn from them. Note: data is the plural form of “datum” or summarize the characteristics of a sample or data

4. TYPES OF STATISTICS? Descriptive Statistics This field of study systematizes the presentation, description, and interpretation of data gathered. a. data collection and presentation b. measures of central tendency c. measures of dispersion and variability d. measures of position

5. TYPES OF STATISTICS? Inferential Statistics It is in this kind of statistics where the following questions are answered: (a) Are boys better than girls in Mathematics? (b) Is the attitude significantly related to the performance? This field of study is to make inferences or conclusions about populations based on samples.

6. Population refers to the groups or aggregates of people, objects, events, or things in any form. The size of the population is denoted by N. Sample consists of few or more members of the population. Samples are taken from the population so as to represent the population characteristics or traits. The size of the sample is denoted by n.

7. Population VS Sample Fort Bonifacio High School Students POPULATION IS A LARGE GROUP SAMPLE IS PART OF A POPULATION Grade 7 Students G7 Triathlon Students Grade 7 Students G7 Triathlon Students Set B Students

8. DATA Quantitative Data Discrete Continuous Qualitative Data

9. Quantitative Data Quantitative data (or variable) consists of numbers representing counts or measurements. In the given examples, quantitative data are weight, height, and age . A discrete variable is a variable that is “countable” A continuous variable is a variable that can assume any numerical value over an interval or intervals

10. Qualitative Data Qualitative data is also called categorical data since this data can be grouped according to categories.

11. Simple Statistical Instrument PRIMARY DATA Primary data is a type of data that is collected by researchers directly from main sources through interviews, surveys, experiments , etc.

12. PRIMARY DATA

13. Simple Statistical Instrument SECONDARY DATA Data that has been collected in the past by someone else but made available for others to use. Examples of secondary data sources include books, journals , articles , web pages , blogs/vlogs, etc.

14. Uses of Statistics

15. Uses of Statistics

16. Uses of Statistics

17. Example 1 Classify whether the given situation belongs to the area of descriptive or inferential statistics. Effect of music in the production of corn Average score of Grade Seven students in the first quarter. At most 5% of the class were affected by poor internet connection at home

18. Example 2. In a recent survey in Maharlika High School, 500 students were asked if they would read news on the Internet at least once a week. Three hundred of these students said yes. Identify the sample and the population. Describe the data set.

19. Example 3 Determine whether each is qualitative or quantitative: Number of students in a class Gender of the household head Use of air-condition unit (yes/no)

20. Example 4 Identify each item as discrete or continuous. Outcomes in tossing a coin Square root of 8 Student enrollment in grade 7

21. QUANTITATIVE DISCRETE Determine whether each of the following is qualitative or quantitative . If quantitative, state whether it is discrete or continuous. Height of your father Number of mobile phones per household Color of eyes QUANTITATIVE CONTINUOUS QUALITATIVE

22. QUALITATIVE Monthly electric bills Skin Color Religions QUANTITATIVE CONTINUOUS QUALITATIVE

23. Learning Activity 1

24. traffic Classify the following variables according to whether it is discrete or continuous The number of cups of coffee sold in a cafeteria during lunch The height of a player on a basketball team The blood pressures of a group of students the day before the final exam The temperature in degrees Fahrenheit on July 4th in Juneau, Alaska The number of goals scored in a soccer game The speed of a car on a Los Angeles freeway during rush hour