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MATH 1280 Introduction to StatisticsLearning Journal 41. Learning Journal Reflective Comments:Write short reflective comments or notes about your learning activities during the week. It is highlyrecommended that you make these entries on a daily basis. You will be assessed on the completeness ofyour Learning Journal, and the quality of your self-reflection.You should date each entry and use clear titles and sub-headings. These entries should be brief, directsentences indicating quick comments or notes such as:* when you completed each step in the Learning Guide during the week,* any problems or unexpected events that occurred during the week (including problems understandingnew or old material), and* any other noteworthy that might affect your performance in this class.There is no need to include personal information or details of family events, but be sure to mention theexistence of any situations that will positively or negatively affect your ability to focus on the classwork.2. Vocabulary and R functionsa) What does the symbol x-bar represent?b) What does the Greek letter mu (μ) represent as it was used in this week's lessons?c) What is the difference between x-bar and mu?3. Meana) Many people already know how to find the mean (average) of a sample of data by "adding all thenumbers and dividing by the number of values in the dataset." Read Chapter 4, and then describe, in