Suppose we want to generate a sample of X using the following probability mass function: X P(X) 1 1/3 3 1/3 5 1/3 Which of the following Excel formulae can be used to achieve this? (a) = 1 + 2*RANDBETWEEN(0,2) (b) = 2*RANDBETWEEN(1,3) - 1 (c) = RANDBETWEEN(1,5) - RANDBETWEEN(2,4) +3 O Only (a) and (b) O Only (a) and (c) O Only (b) and (c) O Only (b) O Only (a) O None of the above O (a), (b) and (c) Only (c)

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Solve the following question

**Generating a Sample of X Using a Probability Mass Function**

Consider we want to generate a sample of `X` using the following probability mass function:

| X | P(X) |
|---|------|
| 1 | 1/3  |
| 3 | 1/3  |
| 5 | 1/3  |

**Question:**
Which of the following Excel formulae can be used to achieve this?

1. (a) = 1 + 2*RANDBETWEEN(0,2)
2. (b) = 2*RANDBETWEEN(1,3) - 1
3. (c) = RANDBETWEEN(1,5) - RANDBETWEEN(2,4) + 3

**Answer Options:**
- Only (a) and (b)
- Only (a) and (c)
- Only (b) and (c)
- Only (b)
- Only (a)
- None of the above
- (a), (b) and (c)
- Only (c)

Choose the correct option based on the provided formulae.

**Explanation:**
- **Formula (a):** `= 1 + 2*RANDBETWEEN(0,2)`
  - `RANDBETWEEN(0,2)` generates a random integer between 0 and 2.
  - Multiplying by 2 gives us numbers {0, 2, 4}.
  - Adding 1 gives us {1, 3, 5}.

- **Formula (b):** `= 2*RANDBETWEEN(1,3) - 1`
  - `RANDBETWEEN(1,3)` generates a random integer between 1 and 3.
  - Multiplying by 2 gives us {2, 4, 6}.
  - Subtracting 1 gives us {1, 3, 5}.

- **Formula (c):** `= RANDBETWEEN(1,5) - RANDBETWEEN(2,4) + 3`
  - This formula needs to be evaluated to check if it generates only the values {1, 3, 5}.

Evaluate the options and determine which set of formulae correctly reproduces the values {1, 3, 5
Transcribed Image Text:**Generating a Sample of X Using a Probability Mass Function** Consider we want to generate a sample of `X` using the following probability mass function: | X | P(X) | |---|------| | 1 | 1/3 | | 3 | 1/3 | | 5 | 1/3 | **Question:** Which of the following Excel formulae can be used to achieve this? 1. (a) = 1 + 2*RANDBETWEEN(0,2) 2. (b) = 2*RANDBETWEEN(1,3) - 1 3. (c) = RANDBETWEEN(1,5) - RANDBETWEEN(2,4) + 3 **Answer Options:** - Only (a) and (b) - Only (a) and (c) - Only (b) and (c) - Only (b) - Only (a) - None of the above - (a), (b) and (c) - Only (c) Choose the correct option based on the provided formulae. **Explanation:** - **Formula (a):** `= 1 + 2*RANDBETWEEN(0,2)` - `RANDBETWEEN(0,2)` generates a random integer between 0 and 2. - Multiplying by 2 gives us numbers {0, 2, 4}. - Adding 1 gives us {1, 3, 5}. - **Formula (b):** `= 2*RANDBETWEEN(1,3) - 1` - `RANDBETWEEN(1,3)` generates a random integer between 1 and 3. - Multiplying by 2 gives us {2, 4, 6}. - Subtracting 1 gives us {1, 3, 5}. - **Formula (c):** `= RANDBETWEEN(1,5) - RANDBETWEEN(2,4) + 3` - This formula needs to be evaluated to check if it generates only the values {1, 3, 5}. Evaluate the options and determine which set of formulae correctly reproduces the values {1, 3, 5
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