MATH 1280 Introduction to Statistics – Learning Journal 2

Saturday, June 22, 2019
Illustration of Sorting data in R program

Question 1. Learning Journal Reflective Comments:
Answer:
First three days of second week, as usual, I read “learning guide unit 2.” I try to understand the topic, what chapter of reading assignment, what is discussion topic. And what is assignment about. Then, I write discussion and post it in the forum.
I learn the topics of second weeks that are the Sampled Data and Reading Data into R. Then, I complete the assignment unit 2. The assignment is quite challenging with many problems to solve by R program.
The last part of second week of study is writing journal about daily activity. After completing the journal, I post it for grading. Fill out the quiz of unit 2 is part of learning process for second week. 

Question 2. Vocabulary and R functions
a) Define the word frequency as it was used in Chapter 2 (include an APA citation).
Answer:
“A frequency is the number of times a given datum occurs in a data set” (Yakir, 2011, p.17)

b) Define the phrase relative frequency as it was used in Chapter 2 (include an APA citation).
Answer:
“A relative frequency is the fraction of times a value occurs” (Yakir, 2011, p.17)

c) What is the difference between frequency and relative frequency?
Answer:
Frequency could be said as the rate of occurrence, while relative frequency is the fraction of how many times a result occurs over the total number of tries. Relative frequency can be obtained by simple calculation.

Orchid for illustration only


Question 3. More practice with R
a) Run interactive R and then run this command:
getwd()
Answer:
[1] "C:/Users/Tanza/Documents"
It is mean that the output is saving in the document (directory)

b) Run the following command and paste the output into your learning journal to demonstrate that you have the file:
ex.1 <- read.csv('ex1.csv')
summary(ex.1)
Answer:
The output (result) is following:
id      sex      height
Min. :1538611 FEMALE:54 Min. :117.0
1st Qu.:3339583 MALE :46 1st Qu.:158.0
Median :5105620 Median :171.0
Mean :5412367 Mean :170.1
3rd Qu.:7622236 3rd Qu.:180.2
Max. :9878130 Max. :208.0


Reference
Yakir, B. 2011. Introduction to Statistical Thinking (With R, Without Calculus). Retrieved From https://my.uopeople.edu/pluginfile.php/157314/mod_resource /content/3/Intro Stat.pdf


11 comments:

  1. This looks and sounds like some interesting information. You did a great job of putting it together, and it's very well presented. Thanks for sharing it.

    Wishing you a wonderful Saturday Night!

    ReplyDelete
    Replies
    1. Thank you to visit my article:
      MATH 1280 Introduction to Statistics – Learning Journal 2
      @
      Illustration of Sorting data in R program

      Delete
    2. MATH 1280 Introduction to Statistics – Learning Journal 2
      @
      Illustration of Sorting data in R program

      Question 1. Learning Journal Reflective Comments:
      Answer:
      First three days of second week, as usual, I read “learning guide unit 2.” I try to understand the topic, what chapter of reading assignment, what is discussion topic. And what is assignment about. Then, I write discussion and post it in the forum.

      I learn the topics of second weeks that are the Sampled Data and Reading Data into R. Then, I complete the assignment unit 2. The assignment is quite challenging with many problems to solve by R program.
      The last part of second week of study is writing journal about daily activity. After completing the journal, I post it for grading. Fill out the quiz of unit 2 is part of learning process for second week.

      Delete
  2. Replies
    1. Thank you to visit my article:
      MATH 1280 Introduction to Statistics – Learning Journal 2
      @
      Question 1. Learning Journal Reflective Comments:
      Answer:
      First three days of second week, as usual, I read “learning guide unit 2.” I try to understand the topic, what chapter of reading assignment, what is discussion topic. And what is assignment about. Then, I write discussion and post it in the forum.
      I learn the topics of second weeks that are the Sampled Data and Reading Data into R. Then, I complete the assignment unit 2. The assignment is quite challenging with many problems to solve by R program.
      The last part of second week of study is writing journal about daily activity. After completing the journal, I post it for grading. Fill out the quiz of unit 2 is part of learning process for second week.

      Delete
  3. This looks complicated to me. Math wasn't my strongest subject in school.

    www.fashionradi.com

    ReplyDelete
    Replies
    1. Thank you to visit my article:
      MATH 1280 Introduction to Statistics – Learning Journal 2
      @
      Question 2. Vocabulary and R functions

      a) Define the word frequency as it was used in Chapter 2 (include an APA citation).

      Answer:

      “A frequency is the number of times a given datum occurs in a data set” (Yakir, 2011, p.17)


      b) Define the phrase relative frequency as it was used in Chapter 2 (include an APA citation).

      Answer:

      “A relative frequency is the fraction of times a value occurs” (Yakir, 2011, p.17)


      c) What is the difference between frequency and relative frequency?

      Answer:

      Frequency could be said as the rate of occurrence, while relative frequency is the fraction of how many times a result occurs over the total number of tries. Relative frequency can be obtained by simple calculation.

      Delete
  4. Replies
    1. Thank you to visit my article:
      MATH 1280 Introduction to Statistics – Learning Journal 2
      @
      Orchid for illustration only

      Delete
  5. I passed statistics in college, but don't know how I did it. Never could understand it.

    ReplyDelete
    Replies
    1. Thank you to visit my article:
      MATH 1280 Introduction to Statistics – Learning Journal 2
      @
      Question 3. More practice with R

      a) Run interactive R and then run this command:

      getwd()

      Answer:

      [1] "C:/Users/Tanza/Documents"


      It is mean that the output is saving in the document (directory)


      b) Run the following command and paste the output into your learning journal to demonstrate that you have the file:


      ex.1 <- read.csv('ex1.csv')

      summary(ex.1)

      Answer:

      The output (result) is following:


      id sex height

      Min. :1538611 FEMALE:54 Min. :117.0

      1st Qu.:3339583 MALE :46 1st Qu.:158.0

      Median :5105620 Median :171.0

      Mean :5412367 Mean :170.1

      3rd Qu.:7622236 3rd Qu.:180.2

      Max. :9878130 Max. :208.0

      Delete