General Concepts and Variables Assignment - Essay Example

General Concepts and Variables Assignment General Concepts and Variables Assignment Read the examples of studies that have then in the email addresses or search in a newspaper or magazine a report of a study and answer the following questions. Internet usability http://www.uberbin.net/archivos/estrategias/usabilidad-los-hombres-lo-prefieren-rapido-las-mujeres-mejor.php Purchase Online Travel http://isabelvazquez.com/2009/02/10/la-compra-de-viajes-por-internet/ a. Research question Is there gender differences in web usability criteria? b. Research Questions Do the majority (82%) prefer specialized web sites compared to traditional Agencies when informing and purchasing travel notes in Spanish network? c. Population and sample Population is Internet users (Men and women using the internet) d.

Say if it is an example of descriptive and inferential statistics. Purchase online travel is an example of inferential statistics The internet usability case is an example of inferential statistics 3. Select which of the following options can be defined as variable: a. The number of women enrolled in Sec 4 of Mat210 Not a variable b. The grade point average of the students of the USC Variable c. The gender of the students in the group Mat 210 Sec 4. Qualitative variable d. The gender of the residents of the Residence of Women.

Qualitative variable e. The height of members of a basketball team. Quantitative variable 2. Classify the following variables using the following criteria: quantitative or qualitative, discrete or continuous, nominal, ordinal or interval / reason: Examples Number of Children: quantitative, discrete, ordinal Age: quantitative continuous interval Genre: qualitative, discrete nominal School level: qualitative, discrete, Nominal Speed: quantitative, continuous, Ratio Primary colors: qualitative, discrete, Ratio Number of TVs: quantitative, discrete, Ratio Academic rank: quantitative, discrete, ordinal 4.

Find an example of a continuous variable displayed with grouped data and determines the number of classes or intervals, the size of each midpoints and the apparent and real limits.  The data represents the number of miles run during in 7 days for a sample of twenty athletes Class Limits Frequency Midpoint 5.5–10.5 1 8 10.5–15.5 2 13 15.5–20.5 3 18 20.5–25.5 5 23 25.5–30.5 4 28 30.5–35.5 3 33 35.5-40.5 2 38 The total number of clases is 7 with 5 miles interval; the midpoint is as shown in the table above.