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Class notes

STA261 Chapters 1&2 Notes

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Notes discussing the main points of chapters one and two of Statistics: the Art and Science of Learning from Data Fourth Edition. Definitions, formulas, and step by steps to data analysis, the empirical rule, z-scores, and more.

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  • May 20, 2024
  • 5
  • 2023/2024
  • Class notes
  • Pubudu hitigala kaluarachchilage
  • Chapters 1 and 2
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Available practice questions

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Some examples from this set of practice questions

1.

What are the key features of quantitative variables?

Answer: Center and Spread of the Data

2.

What is the key feature of categorical variables?

Answer: Relative number of observations

3.

What does it mean when a quantitative variable is discrete?

Answer: The values form a set of numbers containing finite possibilities for results

4.

What does is mean for a quantitative variable to be continuous?

Answer: Values exist at an interval where infinite possible values exist

5.

Name 3 features of distribution

Answer: Modal category, shape, center, variability, proportion, percentage

6.

What 2 features of distribution are considered relative frequencies?

Answer: Proportion and Percentage

7.

Discrete quantitative variables test

Answer: Distinct values and frequencies

8.

Continuous variables

Answer: Divide scale into intervals and test frequency of each

9.

Unimodal Distribution

Answer: Single mound/peak

10.

Bimodal Distribution

Answer: Two distinct peaks

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