# Standard Deviation and Standard Error

When collecting data, how do researchers like Dr. Wortman know they are collecting good quality data and know that their data is accurate and not disrupted by noise or environmental error? We can use math (or statistics) to help us learn how reliable Dr. Wortman's data is. In this case, we'll calculate the Standard Deviation and Standard Error of the data. With the data and calculations in our Excel sheet, we can create a box plot to help us visualize the data. Watch the following videos to learn more about this topic.

If you have some trouble viewing the video click on Standard Deviation and Standard Error

In the video you just watched Kristina mention a way that is easy and simple to calculate Standard Deviation and Standard Error that can sometimes be difficult/time consuming to do on paper. In the next video watch Kristina go through step by step on how to make these calculations using Excel.

If you are having trouble viewing this video click Calculating Standard deviation and Error

Now that we know more about Standard Deviation and Standard Error lets put what we learned into practice. Click next learn how to create the graphic.

## Quiz

Question

Which of the two values should have a larger numerical value: Standard Deviation or Standard Error?

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Question

True or False: You need Standard Deviation to calculate Standard Error.

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Question

Which of the following is an indication of the reliability of the mean?

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