Answers to Selected In-Class Activities

• UNIT I   EXPLORING DATA: DISTRIBUTIONS

• Topic 1: Data and Variables
• Topic 2: Data, Variables, and Technology
• Topic 3: Displaying and Describing Distributions
• Topic 4: Measures of Center
• Topic 5: Measures of Spread  

• UNIT II   EXPLORING DATA: COMPARISONS AND RELATIONSHIPS

• Topic 6: Comparing Distributions I: Quantitative Variables
• Topic 7: Comparing Distributions II: Categorical Variables
• Topic 8: Graphical Displays of Association
• Topic 9: Correlation Coefficient
• Topic 10: Least Squares Regression I
• Topic 11: Least Squares Regression II  

• UNIT III   COLLECTING DATA

• Topic 12: Sampling
• Topic 13: Designing Studies  

• UNIT IV   RANDOMNESS IN DATA

• Topic 14: Probablity
• Topic 15: Normal Distributions
• Topic 16: Sampling Distributions I: Proportions
• Topic 17: Sampling Distributions II: Means
• Topic 18: Central Limit Theorem

• UNIT V   INFERENCE FROM DATA: PRINCIPLES

• Topic 19: Confidence Intervals I: Proportions
• Topic 20: Confidence Intervals II: Means
• Topic 21: Tests of Significance I: Proportions
• Topic 22: Tests of Significance II: Means
• Topic 23: More Inference Considerations  

• UNIT VI   INFERENCE FROM DATA: COMPARISONS AND RELATIONSHIPS

• Topic 24: Comparing Two Proportions
• Topic 25: Comparing Two Means
• Topic 26: Inference for Two-Way Tables
• Topic 27: Inference for Correlation and Regression