LJ - Unit 04 - LJ - Unit 04 PDF

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LJ - Unit 04...

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Part 1:

My activities in math 1280 course during the Fourth week:

Sunday 2/21/2021: Preparation.  

I had read unit 4 to get a quick review highlighting the valuable information needed for me. I started to study the materials from the textbook.

Sunday 2/21/2021: 

I did complete the remaining study needed from the textbook.

Monday 2/22/2021: Getting Ready. 

I had watched part of a video lecture which is 2 hours long, from an outside source which explains unit 4 of the notebook material.

Tuesday 2/23/2021: Study. 

I had watched some videos from khan academy website in statistics and probability topics related to the unit 4 from this course.

Wednesday 2/24/2021: Answering the assignments.  

I had posted in the unit 4 discussion forum and I did reply to 3 of my peers' answers. I had submitted my answer for the unit four assignment in the assignment section.

Thursday 2/25/2021: Finalizing.  

I had submitted my learning journal assignment for unit four. I did the peer assessment to 3 peers for their unit 4 assignment.

And I will continue to finalize a summary all the lectures from the beginning till the end of unit 4 on Friday 26th of Feb.

_____________________________________________________________________________________ Part 2:

a) What does the symbol x-bar represent? it represents the sample mean

b) What does the Greek letter mu (μ) represent as it was used in this week's lessons? It represents the mean of a population c) What is the difference between x-bar and mu? there is no difference in the computing the mean for a sample or population the only difference in the letters to indicate each if it’s for a population or a sample

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Part 3:

a) Lets assume the data set as below

Values 10,11,12,13,14,15,16 Probability 0.12, 0.13, 0.25, 0.15, 0.17, 0.10, 0.08

> Values Probability K = Values * Probability > sum(K) [1] 12.74

Each data point been multiplied by its respective multiply then all been summed to give us the mean as above

b) in the above example after the data been assigned to the variable values and its each of respective probability to the Probability object then through the multiplication each item in the value been multiplied to its respective value from the Probability object then all been summed to give us the mean of the data.

References: Yakir, B. (2011). Introduction to Statistical Thinking (With R, Without Calculus). Jerusalem, IL: The Hebrew University of Jerusalem, Department of Statistics....