When using the normal approximation with the continuity correction, to calculate P (58 < X < 62), which two numbers should you standardize to z-values? O 58.5 and 62.5 O 57.5 and 62.5 O 57.5 and 61.5 O 58.5 and 61.5 O something else

A First Course in Probability (10th Edition)
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Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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**Question:**

When using the normal approximation with the continuity correction, to calculate \( P(58 < X \leq 62) \), which two numbers should you standardize to z-values?

- [ ] 58.5 and 62.5
- [ ] 57.5 and 62.5
- [ ] 57.5 and 61.5
- [x] 58.5 and 61.5
- [ ] something else

**Explanation:**

The correct approach to solve this problem involves using a continuity correction when approximating a discrete distribution, like the binomial, with a continuous distribution, like the normal distribution.

For the given probability range \( P(58 < X \leq 62) \):

1. Adjust the lower limit using the continuity correction: \( 58 < X \) becomes \( X \geq 58.5 \).
2. Adjust the upper limit already included \( X \leq 62 \) to \( X \leq 61.5 \).

The numbers to standardize to z-values are therefore 58.5 and 61.5.
Transcribed Image Text:**Question:** When using the normal approximation with the continuity correction, to calculate \( P(58 < X \leq 62) \), which two numbers should you standardize to z-values? - [ ] 58.5 and 62.5 - [ ] 57.5 and 62.5 - [ ] 57.5 and 61.5 - [x] 58.5 and 61.5 - [ ] something else **Explanation:** The correct approach to solve this problem involves using a continuity correction when approximating a discrete distribution, like the binomial, with a continuous distribution, like the normal distribution. For the given probability range \( P(58 < X \leq 62) \): 1. Adjust the lower limit using the continuity correction: \( 58 < X \) becomes \( X \geq 58.5 \). 2. Adjust the upper limit already included \( X \leq 62 \) to \( X \leq 61.5 \). The numbers to standardize to z-values are therefore 58.5 and 61.5.
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