Textbook Question
"In studies of monozygotic (identical) twins, the correlation between intelligence (IQ) scores is 0.85.
c. What fraction of the variation in one twin’s IQ can be accounted for by the other twin’s IQ?"
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Table of contents
- 1. Intro to Stats and Collecting Data
- 2. Describing Data with Tables and Graphs
- 3. Describing Data Numerically
- 4. Probability
- 5. Binomial Distribution & Discrete Random Variables
- 6. Normal Distribution and Continuous Random Variables
- 7. Sampling Distributions & Confidence Intervals: Mean
- Sampling Distribution of the Sample Mean and Central Limit Theorem
- Distribution of Sample Mean - Excel
- Introduction to Confidence Intervals
- Confidence Intervals for Population Mean
- Determining the Minimum Sample Size Required
- Finding Probabilities and T Critical Values - Excel
- Confidence Intervals for Population Means - Excel
- 8. Sampling Distributions & Confidence Intervals: Proportion
- 9. Hypothesis Testing for One Sample
- 10. Hypothesis Testing for Two Samples
- Two Proportions
- Two Proportions Hypothesis Test - Excel
- Two Means - Unknown, Unequal Variance
- Two Means - Unknown Variances Hypothesis Test - Excel
- Two Means - Unknown, Equal Variance
- Two Means - Unknown, Equal Variances Hypothesis Test - Excel
- Two Means - Known Variance
- Two Means - Sigma Known Hypothesis Test - Excel
- Two Means - Matched Pairs (Dependent Samples)
- Matched Pairs Hypothesis Test - Excel
- 11. Correlation
- 12. Regression
- 13. Chi-Square Tests & Goodness of Fit
- 14. ANOVA
11. Correlation
Correlation Coefficient
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