The president of Doerman Distributors, Inc., believes that 32% of the firm's orders come from first-time customers. A simple random sample of 100 orders will be used to estimate the proportion of first-time customers. Use z-table. a. Assume that the president is correct and p = 0.32. What is the sampling distribution of p for this study? A normal distribution because np and n(1-p) are both greater than 5 b. What is the probability that the sample proportion will be between 0.24 and 0.40 (to 4 decimals)? .9146 c. What is the probability that the sample proportion will be between 0.29 and 0.35 (to 4 decimals)?

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# Educational Content: Sampling Distribution of p

## Exercise 07.31 Algo (Sampling Distribution of p)

### Context
The president of Doerman Distributors, Inc., believes that 32% of the firm's orders come from first-time customers. A simple random sample of 100 orders will be used to estimate the proportion of first-time customers.

### Problem Statements

1. **Assumptions and Distribution**
   - Assume the president’s belief is correct with \( p = 0.32 \).
   - **Question:** What is the sampling distribution of \( \hat{p} \) for this study?
     - **Answer:** It's a normal distribution because \( np \) and \( n(1-p) \) are both greater than 5. ✔️

2. **Probability Calculations**
   - **Question (b):** What is the probability that the sample proportion will be between 0.24 and 0.40 (to 4 decimals)?
     - **Answer:** 0.9146 ✔️

   - **Question (c):** What is the probability that the sample proportion will be between 0.29 and 0.35 (to 4 decimals)?
     - **Answer Section:** Incorrect attempt with a blank input. ❌

### Feedback
- **Status:** Partially Correct
- **Action:** The student may review their calculations for the latter probability question, ensuring the correct use of the z-table for precise results.

#### Note
The exercise is part of a statistical estimate on sampling distributions, emphasizing the importance of normal distribution assumptions and probability calculations using z-tables.

## Additional Resources
- Z-table lookup and application
- Concepts of normal distribution and sampling proportions

### Technical Details
- This task was performed on a MacBook Pro, using browser-based educational software (Cengage MindTap). 
- Comments and progress are tracked, providing immediate student feedback and opportunities for iterative learning.
Transcribed Image Text:# Educational Content: Sampling Distribution of p ## Exercise 07.31 Algo (Sampling Distribution of p) ### Context The president of Doerman Distributors, Inc., believes that 32% of the firm's orders come from first-time customers. A simple random sample of 100 orders will be used to estimate the proportion of first-time customers. ### Problem Statements 1. **Assumptions and Distribution** - Assume the president’s belief is correct with \( p = 0.32 \). - **Question:** What is the sampling distribution of \( \hat{p} \) for this study? - **Answer:** It's a normal distribution because \( np \) and \( n(1-p) \) are both greater than 5. ✔️ 2. **Probability Calculations** - **Question (b):** What is the probability that the sample proportion will be between 0.24 and 0.40 (to 4 decimals)? - **Answer:** 0.9146 ✔️ - **Question (c):** What is the probability that the sample proportion will be between 0.29 and 0.35 (to 4 decimals)? - **Answer Section:** Incorrect attempt with a blank input. ❌ ### Feedback - **Status:** Partially Correct - **Action:** The student may review their calculations for the latter probability question, ensuring the correct use of the z-table for precise results. #### Note The exercise is part of a statistical estimate on sampling distributions, emphasizing the importance of normal distribution assumptions and probability calculations using z-tables. ## Additional Resources - Z-table lookup and application - Concepts of normal distribution and sampling proportions ### Technical Details - This task was performed on a MacBook Pro, using browser-based educational software (Cengage MindTap). - Comments and progress are tracked, providing immediate student feedback and opportunities for iterative learning.
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