# Using one wristwatch that is reasonably accurate, set the time to be exact. Visit www.time.gov to set

## Question:

Using one wristwatch that is reasonably accurate, set the time to be exact. Visit www.time.gov to set the exact time. If you cannot set the time to the nearest second, record the error for the watch you are using. Now compare the time on this watch to the time on other watches that have not been set to the exact time. Record the errors with negative signs for watches that are ahead of the actual time and positive signs for those watches that are behind the actual time. Use the data to test the claim that the mean error of all wristwatches is equal to 0. Do we collectively run on time, or are we early or late? Also test the claim that the standard deviation of errors is less than 1 min. What are the practical implications of a standard deviation that is excessively large?

## Step by Step Answer:

**Related Book For**

## Mathematical Interest Theory

**ISBN:** 9781470465681

3rd Edition

**Authors:** Leslie Jane, James Daniel, Federer Vaaler

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