Learning Journal Unit 2 - Math 1280 PDF

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1. Learning Journal Reflective Comments:November 20th, 2020: I learned about how to read the .txt files in R programing language. November 21st, 2020: I studied about the types of data in R and understood the data that are available in question and then utilize it to assign right types of variables ...

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1. Learning Journal Reflective Comments: th

November 20 , 2020: I learned about how to read the .txt files in R programing language. November 21st, 2020: I studied about the types of data in R and understood the data that are available in question and then utilize it to assign right types of variables and create a piot graph to show those data. th

November 24 , 2020: I studied about CRF, then using mean, mode functions of R programming to write the answer for the unit 2 assignments work. Also practically I did read data and understand how to read it's each column data and then getting totals frequents number times repeated data, etc. th

November 25 , 2020: I have written this learning journal and studied the frequency and relative frequency. Also, I used the "summary" function of R. 2. Vocabulary and R functions

a) Define the word frequency as it was used in Chapter 2 (include an APA citation). Answer: The frequency is the number occurrences of repeating particular numbers or events per unit of time (Wikipedia, n.d). And according to the Illowsky and Dean (2013) "The frequency tells the number of data points that have each value." b) Define the phrase relative frequency as it was used in Chapter 2 (include an APA citation). Answer: According to the Illowsky and Dean (2013) "The relative frequency shows the proportion of data points that have each value." c) What is the difference between frequency and relative frequency? Answer: According to the Illowsky and Dean (2013) "The relative frequency shows the proportion of data points that have each value. The frequency tells the number of data points that have each value." 3. More practice with R

a) Run interactive R and then run this command: getwd() Answer: The getwd() is a function which returns the current user directory. b) Run the following command and paste the output into your learning journal to demonstrate that you have the file: ex.1 flowers.data summary(flowers.data)

Output: Sepal.Length Min.

:4.300

1st Qu.:5.100

Sepal.Width Min.

:2.000

Petal.Length Min.

:1.000

Petal.Width Min.

:0.100

Species Length:150

1st Qu.:2.800

1st Qu.:1.600

1st Qu.:0.300

Class

Median :3.000

Median :4.350

Median :1.300

Mode

Mean

Mean

Mean

:character Median :5.800 :character Mean

:5.843

:3.057

:3.758

:1.199

3rd Qu.:6.400

3rd Qu.:3.300

3rd Qu.:5.100

3rd Qu.:1.800

Max.

Max.

Max.

Max.

:7.900

:4.400

:6.900

:2.500

Reference Illowsky, B. & Dean, S. OpenStax College (2017). Psychology. Houston, TX: Rice University. Wikipedia. (n.d). Frequency. Retrieved from https://en.wikipedia.org/wiki/Frequency...