A random sample of 16 pharmacy customers showed the waiting times below (in minutes). 20 14 23 22 22 15 21 18 17 14 25 15 21 20 14 23 Click here for the Excel Data File Find a 90 percent confidence interval for u, assuming that the sample is from a normal population. (Round your standard deviation answer to 4 decimal places and t-value to 3 decimal places. Round your answers to 3 decimal places.) The 90% confidence interval to

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**Educational Exercise: Confidence Interval Calculation**

A random sample of 16 pharmacy customers showed the waiting times below (in minutes):

```
20, 14, 23, 22, 22, 21, 18
23, 17, 14, 25, 25, 15, 20, 14
```

[Click here for the Excel Data File]

**Task:**

Find a 90 percent confidence interval for μ, assuming that the sample is from a normal population. 

- **Round your standard deviation answer to 4 decimal places and t-value to 3 decimal places.**
- **Round your final answers to 3 decimal places.**

The 90% confidence interval is: [ _____ ] to [ _____ ]
Transcribed Image Text:**Educational Exercise: Confidence Interval Calculation** A random sample of 16 pharmacy customers showed the waiting times below (in minutes): ``` 20, 14, 23, 22, 22, 21, 18 23, 17, 14, 25, 25, 15, 20, 14 ``` [Click here for the Excel Data File] **Task:** Find a 90 percent confidence interval for μ, assuming that the sample is from a normal population. - **Round your standard deviation answer to 4 decimal places and t-value to 3 decimal places.** - **Round your final answers to 3 decimal places.** The 90% confidence interval is: [ _____ ] to [ _____ ]
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