# Student's t-distribution Plushie

\$23.00

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## Item details

Materials

flannel, polyfill, cotton embroidery floss

The normal distribution comes in really handy when computing confidence intervals and performing hypothesis test, when you have a large enough sample. But when your sample is too small, you'll get better results by using the t-distribution.

Student's t-distribution gets its name because of an anonymous publishing by Gosset back in the 1900's. Today this distribution is widely used by many people in many disciplines. The t-distribution is bell-shaped and symmetric around 0, similar to the standard normal distribution. However, the t-distribution's shape is determined by its degrees of freedom. Small degrees of freedom result in heavy tails and a low peak. As the degrees of freedom increase, the shape approaches the normal.

To help represent the changing shape of the t-distribution three degrees of freedom were chosen, 1, 2, and 200, and are embroidered in shades of gray. On the back of the plushie is a t and a legend for the three curves, as shown in the last image.

This listing is for one anatomically correct* t-distribution plushie. The plushie is made from pre-washed baby blue flannel. All features are hand embroidered. The plushie is gently stuffed with poly-fil.

*The open-source program R was used to create the pattern.

Size: Approximately 10" long and 7" tall
The normal distribution comes in really handy when computing confidence intervals and performing hypothesis test, when you have a large enough sample. But when your sample is too small, you'll get better results by using the t-distribution.

Student's t-distribution gets its name because of an anonymous publishing by Gosset back in the 1900's. Today this distribution is widely used by many people in many disciplines. The t-distribution is bell-shaped and symmetric around 0, similar to the standard normal distribution. However, the t-distribution's shape is determined by its degrees of freedom. Small degrees of freedom result in heavy tails and a low peak. As the degrees of freedom increase, the shape approaches the normal.

To help represent the changing shape of the t-distribution three degrees of freedom were chosen, 1, 2, and 200, and are embroidered in shades of gray. On the back of the plushie is a t and a legend for the three curves, as shown in the last image.

This listing is for one anatomically correct* t-distribution plushie. The plushie is made from pre-washed baby blue flannel. All features are hand embroidered. The plushie is gently stuffed with poly-fil.

*The open-source program R was used to create the pattern.

Size: Approximately 10" long and 7" tall

## Shipping & returns

Ready to ship in 1–2 weeks
From United States
Returns and exchanges accepted
Exceptions may apply. See return policy

## Reviews

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Garden City, Kansas
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## Returns & exchanges

### I gladly accept returns, exchanges, and cancellations

Contact me within: 14 days of delivery
Ship items back within: 30 days of delivery
Request a cancellation within: 3 days of purchase

### The following items can't be returned or exchanged

Because of the nature of these items, unless they arrive damaged or defective, I can't accept returns for:
• Custom or personalized orders

### Returns and exchange details

If there is a problem with your purchase, please let me know as soon as possible. Postage for returns will be the buyer's responsibility. If a refund is due, I will refund the price of the item(s) after returned to me.

## Shipping policies

Please allow us some time to make your order. Since we hand make most of our products we usually can not ship out an order as soon as it is placed. If there is a specific date you'd like the item by, let me know so I can try to get it there in time.

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Please be aware that international packages may require import taxes upon shipping. These vary by country.