The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 59 ounces and a standard deviation of 6 ounces. a) 99.7% of the widget weights lie between and b) What percentage of the widget weights lie between 47 and 77 ounces? c) What percentage of the widget weights lie below 65 ?
The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 59 ounces and a standard deviation of 6 ounces. a) 99.7% of the widget weights lie between and b) What percentage of the widget weights lie between 47 and 77 ounces? c) What percentage of the widget weights lie below 65 ?
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![### Acme Company's Widget Weight Distribution Analysis
The Acme Company manufactures widgets. The widget weights follow a bell-shaped distribution with a mean weight of 59 ounces and a standard deviation of 6 ounces. We will analyze the weight distribution by answering the following questions:
a) **99.7% of the widget weights lie between:**
- **[ ] and [ ]**
b) **What percentage of the widget weights lie between 47 and 77 ounces?**
- **[ ] %**
c) **What percentage of the widget weights lie below 65 ounces?**
- **[ ] %**
#### Detailed Analysis:
1. **99.7% Range Calculation:**
According to the empirical rule for a normal distribution:
- 68% of data lies within ±1 standard deviation from the mean.
- 95% of data lies within ±2 standard deviations from the mean.
- 99.7% of data lies within ±3 standard deviations from the mean.
Given the mean (μ) = 59 ounces and standard deviation (σ) = 6 ounces:
To find the range for 99.7%:
- Lower limit = μ - 3σ = 59 - 18 = 41 ounces
- Upper limit = μ + 3σ = 59 + 18 = 77 ounces
So, **99.7% of the widget weights lie between 41 and 77 ounces.**
2. **Percentage calculation between 47 and 77 ounces:**
Using the mean (59 ounces) and standard deviation (6 ounces), calculate z-scores for 47 and 77:
- For 47 ounces: \( Z = \frac{47 - 59}{6} = -2 \)
- For 77 ounces: \( Z = \frac{77 - 59}{6} = 3 \)
Using standard normal distribution tables or a calculator:
- The area to the left of z = -2 is approximately 2.5%.
- The area to the left of z = 3 is approximately 99.9%.
The percentage between z = -2 and z = 3 is \( 99.9 - 2.5 = 97.4\% \).
Therefore, **97.4% of the widget weights lie between 47 and 77 ounces.**
3. **Percentage](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F07eedd0d-121f-4b38-8aa1-4108ea76d137%2F5e95ebdf-fe64-410a-b005-7cfd09f9029d%2Fhsf5sv_processed.png&w=3840&q=75)
Transcribed Image Text:### Acme Company's Widget Weight Distribution Analysis
The Acme Company manufactures widgets. The widget weights follow a bell-shaped distribution with a mean weight of 59 ounces and a standard deviation of 6 ounces. We will analyze the weight distribution by answering the following questions:
a) **99.7% of the widget weights lie between:**
- **[ ] and [ ]**
b) **What percentage of the widget weights lie between 47 and 77 ounces?**
- **[ ] %**
c) **What percentage of the widget weights lie below 65 ounces?**
- **[ ] %**
#### Detailed Analysis:
1. **99.7% Range Calculation:**
According to the empirical rule for a normal distribution:
- 68% of data lies within ±1 standard deviation from the mean.
- 95% of data lies within ±2 standard deviations from the mean.
- 99.7% of data lies within ±3 standard deviations from the mean.
Given the mean (μ) = 59 ounces and standard deviation (σ) = 6 ounces:
To find the range for 99.7%:
- Lower limit = μ - 3σ = 59 - 18 = 41 ounces
- Upper limit = μ + 3σ = 59 + 18 = 77 ounces
So, **99.7% of the widget weights lie between 41 and 77 ounces.**
2. **Percentage calculation between 47 and 77 ounces:**
Using the mean (59 ounces) and standard deviation (6 ounces), calculate z-scores for 47 and 77:
- For 47 ounces: \( Z = \frac{47 - 59}{6} = -2 \)
- For 77 ounces: \( Z = \frac{77 - 59}{6} = 3 \)
Using standard normal distribution tables or a calculator:
- The area to the left of z = -2 is approximately 2.5%.
- The area to the left of z = 3 is approximately 99.9%.
The percentage between z = -2 and z = 3 is \( 99.9 - 2.5 = 97.4\% \).
Therefore, **97.4% of the widget weights lie between 47 and 77 ounces.**
3. **Percentage
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