Temperatures in June in the Paradise City are distributed nearly normally with mean 80 degrees and standard deviation 6 degrees F. Which of the following temperatures would be considered unusual? O 72.8 O 79.4 O 65 ) 82.4 O 82.4
Temperatures in June in the Paradise City are distributed nearly normally with mean 80 degrees and standard deviation 6 degrees F. Which of the following temperatures would be considered unusual? O 72.8 O 79.4 O 65 ) 82.4 O 82.4
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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![### Understanding Normal Distributions in Temperature Data
In Paradise City, temperatures during June follow a nearly normal distribution pattern. This distribution has a mean (average) temperature of 80 degrees Fahrenheit and a standard deviation of 6 degrees Fahrenheit. In this context, the standard deviation is a measure of how much temperatures typically vary from the mean.
#### Question:
Which of the following temperatures would be considered unusual?
- 72.8°F
- 79.4°F
- 65°F
- 82.4°F
- 82.4°F
To determine if a temperature is unusual, we need to consider how far it deviates from the mean in terms of standard deviation units (also known as Z-scores). Generally, values that are more than 2 standard deviations away from the mean are considered unusual.
***Example Calculation:***
- Mean (μ) = 80°F
- Standard Deviation (σ) = 6°F
Let's calculate how far 65°F is from the mean:
\[ \text{Z-score} = \frac{(X - \mu)}{\sigma} \]
\[ \text{Z-score for 65°F} = \frac{(65 - 80)}{6} \]
\[ \text{Z-score for 65°F} = \frac{-15}{6} \]
\[ \text{Z-score for 65°F} = -2.5 \]
A Z-score of -2.5 indicates that 65°F is 2.5 standard deviations below the mean. Since this is more than 2 standard deviations away from the mean, the temperature of 65°F would be considered unusual.
Let's review each temperature to identify which is considered unusual:
- 72.8°F -> Calculate its Z-score
- 79.4°F -> Calculate its Z-score
- 65°F -> Already calculated as unusual
- 82.4°F -> Calculate its Z-score
- 82.4°F -> Same as the previous 82.4°F
You can perform similar Z-score calculations to determine the usualness of the other temperatures. Generally, a Z-score greater than 2 or less than -2 indicates an unusual value.
**Note:** The repeated value of 82.4°F seems to be a duplicate choice in the provided options. To ensure clarity, confirm that each option represents a distinct value when constructing your question set.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F07eedd0d-121f-4b38-8aa1-4108ea76d137%2F09a144ba-df30-41ff-b2e0-956304227b88%2Fo6y3h8j_processed.png&w=3840&q=75)
Transcribed Image Text:### Understanding Normal Distributions in Temperature Data
In Paradise City, temperatures during June follow a nearly normal distribution pattern. This distribution has a mean (average) temperature of 80 degrees Fahrenheit and a standard deviation of 6 degrees Fahrenheit. In this context, the standard deviation is a measure of how much temperatures typically vary from the mean.
#### Question:
Which of the following temperatures would be considered unusual?
- 72.8°F
- 79.4°F
- 65°F
- 82.4°F
- 82.4°F
To determine if a temperature is unusual, we need to consider how far it deviates from the mean in terms of standard deviation units (also known as Z-scores). Generally, values that are more than 2 standard deviations away from the mean are considered unusual.
***Example Calculation:***
- Mean (μ) = 80°F
- Standard Deviation (σ) = 6°F
Let's calculate how far 65°F is from the mean:
\[ \text{Z-score} = \frac{(X - \mu)}{\sigma} \]
\[ \text{Z-score for 65°F} = \frac{(65 - 80)}{6} \]
\[ \text{Z-score for 65°F} = \frac{-15}{6} \]
\[ \text{Z-score for 65°F} = -2.5 \]
A Z-score of -2.5 indicates that 65°F is 2.5 standard deviations below the mean. Since this is more than 2 standard deviations away from the mean, the temperature of 65°F would be considered unusual.
Let's review each temperature to identify which is considered unusual:
- 72.8°F -> Calculate its Z-score
- 79.4°F -> Calculate its Z-score
- 65°F -> Already calculated as unusual
- 82.4°F -> Calculate its Z-score
- 82.4°F -> Same as the previous 82.4°F
You can perform similar Z-score calculations to determine the usualness of the other temperatures. Generally, a Z-score greater than 2 or less than -2 indicates an unusual value.
**Note:** The repeated value of 82.4°F seems to be a duplicate choice in the provided options. To ensure clarity, confirm that each option represents a distinct value when constructing your question set.
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