---
# System prepended metadata

title: '365 Data science:'

---

365 Data science:
===

## Example of confidence interval

![](https://i.imgur.com/bw4zHTu.jpg)


![](https://i.imgur.com/W57ENyO.jpg)


# confidence interval for T distribution

- form normal, u need the SD, and st Error
-  ![](https://i.imgur.com/Az0FGFz.png)



## Hypothesis testing


- Steps:
![](https://i.imgur.com/JflCTEN.png)

- H0 is an an idea that can be tested:

![](https://i.imgur.com/EKv4Vvw.jpg)


## 2 Side  Z test:
![](https://i.imgur.com/x8eU4in.jpg)



## one Side Test:

![](https://i.imgur.com/9kqVOTh.jpg)

![](https://i.imgur.com/nbWgqLd.jpg)


## Error in Hypothesis Testing:

![](https://i.imgur.com/CGeBpfO.png)

- Example:
- Using Zscore:
![](https://i.imgur.com/tTmshHY.png)


- P values:
- ![](https://i.imgur.com/YCHxv0P.jpg)



- ![](https://i.imgur.com/LkcpjRm.png)
