1. 1
    Finding the center of a dataset is one of the most common ways to summarize statistical findings. Often, people communicate the center of data using words like, on average, usually, or often….
  2. 2
    The mean, often referred to as the average, is a way to measure the center of a dataset. The average of a set is calculated using a two-step process: 1. Add all of the observations in your da…
  3. 3
    While you’ve shown that you can calculate the average yourself, it becomes time-consuming as the size of your dataset increases — imagine adding all of the numbers in a dataset with 10,000 ob…
  4. 4
    In this lesson, you learned how to calculate the average of a dataset using the formula: \bar{x} = \frac{x_1 + x2 … + x{n}}{n} and the R function: mean(my_data) — Circling back to the ori…
  1. 1
    In this lesson, you will learn how to find the median of a dataset — a common measure of a dataset’s center. Each of the next three exercises will cover the following topics: - Manually fin…
  2. 2
    The formal definition for the median of a dataset is: *The value that, assuming the dataset is ordered from smallest to largest, falls in the middle. If there are an even number of values in a dat…
  3. 3
    Finding the median of a dataset becomes increasingly time-consuming as the size of your dataset increases — imagine finding the median of an unsorted dataset with 10,000 observations. The R …
  4. 4
    In this lesson, you learned how to find the median of a dataset in two steps: 1. Sort the dataset 2. Identify the one or two numbers that fall in the middle of the sorted dataset You also learned …
  1. 1
    In this lesson, you will learn how to find the mode of a dataset. Each of the next three exercises will cover the following: - Manually finding the mode of a dataset - Using R’s functions to find…
  2. 2
    The formal definition for the mode of a dataset is: *The most frequently occurring observation in the dataset. A dataset can have multiple modes if there is more than one value with the same maxim…
  3. 3
    Finding the mode of a dataset becomes increasingly time-consuming as the size of your dataset increases — imagine finding the mode of a dataset with 10,000 observations. The R package DescTo…
  4. 4
    In this lesson, you learned how to find the mode of a dataset in two steps: 1. Find the frequency of every unique number in the dataset 2. Determine which number has the highest frequency You also…

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