##### Asked by: Shalini Teijeiro

asked in category: General Last Updated: 7th April, 2020# What is critical value and p value?

**p**-

**value**,

**critical value**and test statistic. As we know

**critical value**is a point beyond which we reject the null hypothesis.

**P**-

**value**on the other hand is defined as the probability to the right of respective statistic (Z, T or chi).

Also know, what does critical value mean?

In hypothesis testing, a **critical value** is a point on the test distribution that is compared to the test statistic to determine whether to reject the null hypothesis. If the absolute **value** of your test statistic is greater than the **critical value**, you **can** declare statistical significance and reject the null hypothesis.

Furthermore, what is the critical value at the 0.05 level of significance? A sample mean with a z-score greater than or equal to the **critical value** of 1.645 is **significant** at the **0.05 level**. There is **0.05** to the right of the **critical value**. DECISION: The sample mean has a z-score greater than or equal to the **critical value** of 1.645. Thus, it is **significant** at the **0.05 level**.

Also know, how do you find the critical value?

**To find the critical value, follow these steps.**

- Compute alpha (α): α = 1 - (confidence level / 100)
- Find the critical probability (p*): p* = 1 - α/2.
- To express the critical value as a z-score, find the z-score having a cumulative probability equal to the critical probability (p*).

Is critical value p value?

Relationship between **p**-**value**, **critical value** and test statistic. As we know **critical value** is a point beyond which we reject the null hypothesis. **P**-**value** on the other hand is defined as the probability to the right of respective statistic (Z, T or chi).