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Questions and Answers
What is a vector?
What is a vector?
- A 2-dimensional representation of arrays of numbers
- A universal symbol for addition
- An object with only magnitude
- An object with both magnitude and direction (correct)
What does the symbol ∑ represent in mathematics?
What does the symbol ∑ represent in mathematics?
- A symbol for conditional probability
- A 2-dimensional representation of arrays of numbers
- An object with both magnitude and direction
- A universal symbol for addition (correct)
What does 'n x m' denote in the context of matrices?
What does 'n x m' denote in the context of matrices?
- The number of elements in a matrix
- The symbol for conditional probability
- The dimension of a matrix, indicating it has n rows and m columns (correct)
- A 1-dimensional array of numbers
What is the difference between Bayesian and Frequentist probability?
What is the difference between Bayesian and Frequentist probability?
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What is a square matrix?
What is a square matrix?
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Study Notes
Vectors and Matrices
- A vector is a mathematical object used to represent quantities with both magnitude and direction.
Mathematical Notation
- The symbol ∑ (sigma) represents the summation of a sequence of numbers in mathematics.
Matrix Dimensions
- 'n x m' denotes the dimensions of a matrix, where 'n' is the number of rows and 'm' is the number of columns.
Probability
- Bayesian probability is based on personal beliefs and subjective probabilities, using prior knowledge to update probabilities as new data arises.
- Frequentist probability is based on the frequency of occurrence of events, using long-run relative frequencies to estimate probabilities.
Matrices
- A square matrix is a matrix with the same number of rows and columns (n x n).
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