A quick review of the key elements of Statistics Fundamentals - Part 2 that would be helpful for Statistics Fundamentals - Part 3, including sampling, confidence intervals, and hypothesis testing .
- Before we jump into Statistics Fundamentals three,…let's make sure we remember the key components…from Statistics Fundamentals one and two.…First, a lightning-fast tour of Statistics Fundamentals one.…The mean and median help us find the center of our data set.…The range and standard deviation reveal the spread…of the data points in our data sets.…Distribution curves give an overall shape to our data set.…And we know that so many things in our world are normally…distributed, especially when we have a lot of data points.…
What does that mean again? Well, it means that data points…are often symmetrically distributed…around the data set's mean.…When we want to know if a particular outcome is likely,…we measure the distance from the mean to the data point…using standard deviation and z-scores.…A z-score of 1.85 tells us that a particular data point…is 1.85 standard deviations away from the data set's mean.…Is that a lot? Is that a little?…It all depends on the size of the standard deviation.…
In Statistics Fundamentals two, we learned the keys…
- Working with small sample sizes
- Using t-statistic vs. z-statistic
- Calculating confidence intervals with t-scores
- Comparing two populations (proportions)
- Comparing two population means
- Chi-square testing
- ANOVA testing
- Regression testing
Skill Level Advanced
1. The Statistics Series: A Look Back and Forward
2. Small Sample Sizes
T-statistic vs. z-statistic3m 44s
3. Comparing Two Populations (Proportions)
4. Comparing Two Populations (Means)
6. ANOVA: Analysis of Variance
7. Introduction to Regression
Next steps1m 40s
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