Normal distribution
Task
A machinery produces screws with an average length of . The length of the screws is normal distributed with a standard deviation of .
Calculate the percentage of screws which are
- shorter than 3.8 in
- longer than 4.3 in
- between 3.9 in and 4.1 in
- shorter than 3.8 in and longer than 4.3 in
Instructions
| 1. | | Select the Normal Distribution from the drop-down list. |
| 2. | | Change the parameter to 4, since the mean of the screws is 4 in. |
| 3. | | Change the parameter to 0.1, since the standard deviation of the screws is 0.1 in. |
| 4. |  | Calculate the probability using the Left Sided button. |
| 5. |  | Calculate the probability using the Right Sided button. |
| 6. |  | Calculate the probability using the Interval button. |
| 7. |  | Calculate the probability using the Two tailed button. |