Table of contents
- 1. Introduction to Statistics53m
- 2. Describing Data with Tables and Graphs2h 1m
- 3. Describing Data Numerically2h 8m
- 4. Probability2h 26m
- 5. Binomial Distribution & Discrete Random Variables3h 28m
- 6. Normal Distribution & Continuous Random Variables2h 21m
- 7. Sampling Distributions & Confidence Intervals: Mean3h 37m
- Sampling Distribution of the Sample Mean and Central Limit Theorem19m
- Distribution of Sample Mean - Excel23m
- Introduction to Confidence Intervals22m
- Confidence Intervals for Population Mean1h 26m
- Determining the Minimum Sample Size Required12m
- Finding Probabilities and T Critical Values - Excel28m
- Confidence Intervals for Population Means - Excel25m
- 8. Sampling Distributions & Confidence Intervals: Proportion1h 33m
- 9. Hypothesis Testing for One Sample3h 32m
- 10. Hypothesis Testing for Two Samples4h 49m
- Two Proportions1h 12m
- Two Proportions Hypothesis Test - Excel28m
- Two Means - Unknown, Unequal Variance1h 2m
- Two Means - Unknown Variances Hypothesis Test - Excel12m
- Two Means - Unknown, Equal Variance15m
- Two Means - Unknown, Equal Variances Hypothesis Test - Excel9m
- Two Means - Known Variance12m
- Two Means - Sigma Known Hypothesis Test - Excel21m
- Two Means - Matched Pairs (Dependent Samples)42m
- Matched Pairs Hypothesis Test - Excel12m
- 11. Correlation1h 24m
- 12. Regression1h 59m
- 13. Chi-Square Tests & Goodness of Fit2h 31m
- 14. ANOVA2h 1m
3. Describing Data Numerically
Percentiles & Quartiles
3. Describing Data Numerically
Percentiles & Quartiles: Videos & Practice Problems
1
concept
Percentiles and Quartiles
Video duration:
7mPlay a video:
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2
Problem
Answer the questions below using the data in the table.

(A) Find P50
(B) A playlist with 15 songs is in which percentile?
(C) Find Q1 and Q3
A
(A) 16; (B) 43rd percentile; (C) Q1=7 & Q3=21
B
(A) 16; (B) 12th percentile; (C) Q1=12 & Q3=20.5
C
(A) 15.5; (B) 43rd percentile; (C) Q1=12 & Q3=20.5
D
(A) 15.5; (B) 12th percentile; (C) Q1=7 & Q3=21
3
example
Percentiles and Quartiles Example 1
Video duration:
2mPlay a video:
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