Variables and Type of Data
Transcript of Variables and Type of Data
![Page 1: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/1.jpg)
VARIABLES AND VARIABLES AND TYPES OF DATATYPES OF DATA
(QUALITATIVE, QUANTITATIVE, DISCRETE AND CONTINOUS
VARIABLES)
![Page 2: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/2.jpg)
Why do we have to study statistics?
To read and understand various statistical studies in related field.
To communicate and explain the results of study in related field using our own words.
To become better consumers and citizens.
![Page 3: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/3.jpg)
Variable
O a characteristics of interest about each individual element of a population or sample
O Example : amount of time spent by one
student
![Page 4: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/4.jpg)
Data O the set of values collected from
the variable from each of the elements that belong to sample
O Example : a value representing the
amount of time spent by one student in years, quarters. months
![Page 5: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/5.jpg)
ExampleA statistics student is interested in finding out something about the average ringgit value of cars owned by the faculty members of our university. Each of the seven terms just describe can be identified in this situation.
1. VARIABLE: the “ringgit value” of each individual car
2. DATA: the set of values that correspond to the sample obtained (45,000; 55,000; 34,0000;…)
![Page 6: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/6.jpg)
From the data collected, the type of data will be identified which classified to qualitative or quantitative, discrete or continuous variables………
![Page 7: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/7.jpg)
Variables and types of Data
![Page 8: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/8.jpg)
Qualitative Variable
Variables that can be placed into distinct categories, according to some characteristic or attribute
example gender (male or female).
![Page 9: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/9.jpg)
Quantitative variables Numerical in nature and can
be ordered or ranked
Example: age is numerical and the
values can be ranked.
![Page 10: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/10.jpg)
Discrete VariablesO A quantitative variable that
can assume a countable number of values.
O Can assume any values corresponding to isolated points along a line interval. That is, there is a gap between any two values.
O Clue countable
![Page 11: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/11.jpg)
Continuous Variables
A quantitative variable that can assume an uncountable number of values.Can assume any value along a line interval, including every possible value between any two values.Clue measured
![Page 12: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/12.jpg)
![Page 13: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/13.jpg)
The grade point averages of five students are listed in the table. Which data are qualitative data and which are quantitative data
Example 1
Qualitative data
Quantitative data
![Page 14: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/14.jpg)
Identify each of the following as an example of qualitative or quantitative variables.
Example 2
1.The breaking strength of a given type of string
2.The hair color of children auditioning for the musical Annie.
3.The number of stop signs in town of less than 500 people.
4.Whether or not a faucet is defective.
![Page 15: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/15.jpg)
1. quantitative 2. qualitative
3. quantitative 4. qualitative
Answer 2
![Page 16: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/16.jpg)
Example 3(from bluman text book)
Classify each variables as qualitative or quantitative
1. Marital status of nurse in a hospital2. Time it takes to run a marathon3. Weights of lobster in a tank in a restaurant4. Colors of automobiles in a shopping center parking lot5. Ounces of ice cream in a large milkshake6. Capacity of the NFL football stadiums7. Ages of people living in personal care home
![Page 17: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/17.jpg)
Answer 3
1. Qualitative 2. Quantitative3. Quantitative 4. Qualitative 5. Quantitative 6. Quantitative 7. Quantitative
![Page 18: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/18.jpg)
Example 4(from bluman text book)
Classify each variable as discrete or continuous
1. Number of pizzas sold by Pizza express2. Relative humidity levels in operating rooms at a local hospital3. Number of bananas in bunch at several local supermarket4. Lifetimes (in hours) of 15 iPod batteries5. Weights of the backpacks of first graders on a school bus6. Number of students each day who make appointments with a math tutor at a local college7. Blood pressure of runners in a marathon
![Page 19: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/19.jpg)
Answer 4
1. Discrete 2. Continuous 3. Discrete 4. continuous5. Continuous 6. Discrete 7. Continuous
![Page 20: Variables and Type of Data](https://reader034.fdocuments.in/reader034/viewer/2022050808/54929672ac7959db3b8b4587/html5/thumbnails/20.jpg)
Video link
http://www.youtube.com/watch?v=Cc32-ebUnjM