Find the Z-scores that separate the middle 72% of the distribution from the area in the tails of the standard normal distribution. Click the icon to view a table of areas under the normal curve. Tables of areas unc The Z-scores are (Use a comma to separate answers as needed. Round to two decimal places as needed.)
Find the Z-scores that separate the middle 72% of the distribution from the area in the tails of the standard normal distribution. Click the icon to view a table of areas under the normal curve. Tables of areas unc The Z-scores are (Use a comma to separate answers as needed. Round to two decimal places as needed.)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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![**Text Description:**
Title: Finding Z-scores for the Middle 72% of a Standard Normal Distribution
**Instructions:**
- Find the Z-scores that separate the middle 72% of the distribution from the area in the tails of the standard normal distribution.
- Click the icon to view a table of areas under the normal curve.
**Input Area:**
- The Z-scores are [________].
*(Use a comma to separate answers as needed. Round to two decimal places as needed.)*
**Options:**
- Help me solve this
- View an example
- Get more help
**Table of Areas Under the Normal Curve:**
The table provides cumulative probabilities for the standard normal distribution:
- The rows and columns indicate the Z-values, and the body of the table shows the area to the left of a given Z-value under the normal curve.
- For example, to find the area for Z = 0.3, locate the row for 0.3 and the column for 0.00, and the intersecting value is the cumulative probability.
**Graph/Diagram Description:**
- The table is a standard Z-table, displaying cumulative probabilities for different Z-scores.
- The rows correspond to the first decimal of the Z-score, ranging from -0.0 to 3.4.
- The columns add additional precision, ranging from .00 to .09.
- Values inside the table represent the probability that a value is less than the corresponding Z-score.
*Note: Adjust the Z-scores as needed to find the correct values separating the middle 72% from the tails.*](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc193c105-11c9-44cc-a7ff-c2d8d94aeaac%2Fd029b9a6-a9ff-41c1-b55c-f13a625fee66%2F340ucz_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Text Description:**
Title: Finding Z-scores for the Middle 72% of a Standard Normal Distribution
**Instructions:**
- Find the Z-scores that separate the middle 72% of the distribution from the area in the tails of the standard normal distribution.
- Click the icon to view a table of areas under the normal curve.
**Input Area:**
- The Z-scores are [________].
*(Use a comma to separate answers as needed. Round to two decimal places as needed.)*
**Options:**
- Help me solve this
- View an example
- Get more help
**Table of Areas Under the Normal Curve:**
The table provides cumulative probabilities for the standard normal distribution:
- The rows and columns indicate the Z-values, and the body of the table shows the area to the left of a given Z-value under the normal curve.
- For example, to find the area for Z = 0.3, locate the row for 0.3 and the column for 0.00, and the intersecting value is the cumulative probability.
**Graph/Diagram Description:**
- The table is a standard Z-table, displaying cumulative probabilities for different Z-scores.
- The rows correspond to the first decimal of the Z-score, ranging from -0.0 to 3.4.
- The columns add additional precision, ranging from .00 to .09.
- Values inside the table represent the probability that a value is less than the corresponding Z-score.
*Note: Adjust the Z-scores as needed to find the correct values separating the middle 72% from the tails.*
![### Understanding Z-Scores for the Normal Distribution
To find the Z-scores that separate the middle 72% of a standard normal distribution from the tails:
1. **Problem Statement:**
- Determine the Z-scores that divide the middle 72% of the distribution from the two tails.
- Use a standard normal distribution table and round your answers to two decimal places.
2. **Using the Table:**
- Refer to the "Tables of areas under the normal curve" provided in the image.
- This table helps find the area under the curve for different Z-score values.
3. **Diagram Explanation:**
- The image includes a small bell curve showing the area in question (the 72% in the center).
- The table (Table V) provides cumulative probabilities for Z-scores ranging from -3.4 to 3.4.
4. **How to Read the Table:**
- The leftmost column lists Z-scores from -3.4 to 3.4.
- The top row represents the decimal extension of the Z-scores (e.g., .00, .01, etc.).
- Cross-referencing a Z-score and its decimal expansion gives the cumulative probability from the left tail.
5. **Steps to Solve:**
- Identify cumulative probabilities corresponding to the lower and upper bounds of the middle 72%.
- For the standard normal distribution, the total area is 1. The middle 72% means 0.72 is centrically distributed, leaving (1 - 0.72) / 2 = 0.14 in each tail.
- Look for the Z-score where the cumulative probability is 0.14 for the lower Z and 0.86 (1 - 0.14) for the upper Z.
6. **Practical Application:**
- These Z-scores define critical regions in hypothesis testing and set thresholds for statistical decision-making.
### Interactive Features:
- **Help Options:**
- "Help me solve this" links to guided solutions.
- "View an example" provides similar problems with solutions.
- "Get more help" offers additional resources or explanations.
- **Print and Done Buttons:**
- These allow you to print the table or close the window once the task is complete.
Use this framework to determine precise Z-scores for your statistical analysis needs, ensuring a comprehensive understanding of data distribution](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc193c105-11c9-44cc-a7ff-c2d8d94aeaac%2Fd029b9a6-a9ff-41c1-b55c-f13a625fee66%2Fgr7nvph_processed.jpeg&w=3840&q=75)
Transcribed Image Text:### Understanding Z-Scores for the Normal Distribution
To find the Z-scores that separate the middle 72% of a standard normal distribution from the tails:
1. **Problem Statement:**
- Determine the Z-scores that divide the middle 72% of the distribution from the two tails.
- Use a standard normal distribution table and round your answers to two decimal places.
2. **Using the Table:**
- Refer to the "Tables of areas under the normal curve" provided in the image.
- This table helps find the area under the curve for different Z-score values.
3. **Diagram Explanation:**
- The image includes a small bell curve showing the area in question (the 72% in the center).
- The table (Table V) provides cumulative probabilities for Z-scores ranging from -3.4 to 3.4.
4. **How to Read the Table:**
- The leftmost column lists Z-scores from -3.4 to 3.4.
- The top row represents the decimal extension of the Z-scores (e.g., .00, .01, etc.).
- Cross-referencing a Z-score and its decimal expansion gives the cumulative probability from the left tail.
5. **Steps to Solve:**
- Identify cumulative probabilities corresponding to the lower and upper bounds of the middle 72%.
- For the standard normal distribution, the total area is 1. The middle 72% means 0.72 is centrically distributed, leaving (1 - 0.72) / 2 = 0.14 in each tail.
- Look for the Z-score where the cumulative probability is 0.14 for the lower Z and 0.86 (1 - 0.14) for the upper Z.
6. **Practical Application:**
- These Z-scores define critical regions in hypothesis testing and set thresholds for statistical decision-making.
### Interactive Features:
- **Help Options:**
- "Help me solve this" links to guided solutions.
- "View an example" provides similar problems with solutions.
- "Get more help" offers additional resources or explanations.
- **Print and Done Buttons:**
- These allow you to print the table or close the window once the task is complete.
Use this framework to determine precise Z-scores for your statistical analysis needs, ensuring a comprehensive understanding of data distribution
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