Textbook vs. online video: One seems to be a better learning tool. Are the differences between the outcomes for these two groups meaningful? With the use of a hypothesis test we attempt to find out, in this tutorial.
- So let's continue our same example.…200 students preparing for a math test.…120 had access to an online video.…This group averaged 16.2 correct questions…out of 20 on the exam.…The Standard deviation for this group is 2.5.…In another group, 80 students learn from a textbook.…This group averaged 14.1 correct questions on the exam.…The Standard deviation of their scores was 3.6.…
The average score for the online video group…was 2.1 questions higher than that of the textbook group.…So does this data make you feel like the online video…is more effective than the textbook?…To find out, let's perform a Hypothesis Test.…Let's begin by setting up our two hypotheses.…Our Null hypothesis will be that the online video…and the textbook are equally effective.…
There is no difference in their ability to prepare…the students for this exam.…In other words, the difference between the population means…of these two groups would be 0.…We would state this Null hypothesis…as the Population mean exam score…for the online video group minus…
- 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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