# How do you find the standardized test statistic Z?

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**Standardized test statistics**are used in hypothesis

**testing**. The general formula formula is:

**Standardized test statistic**: (

**statistic**-parameter)/(standard deviation of the

**statistic**). The formula by itself doesn't mean much, unless you also know the three major forms of the equation for

**z**-scores and t-scores.

Similarly, what is Z test statistic formula?

The **test statistic** is a **z**-score (**z**) defined by the following **equation**. **z**=(p−P)σ where P is the hypothesized value of population proportion in the null hypothesis, p is the sample proportion, and σ is the standard deviation of the sampling distribution.

**test statistic**is a random variable that is calculated from

**sample**data and used in a hypothesis

**test**. You can use

**test statistics**to determine whether to reject the null hypothesis. The

**test statistic**compares your data with what is expected under the null hypothesis.

Also Know, how do you find the hypothesis test statistic?

**Analyze sample data.**

- Test statistic. When the null hypothesis involves a mean or proportion, use either of the following equations to compute the test statistic.
- P-value. The P-value is the probability of observing a sample statistic as extreme as the test statistic, assuming the null hypothesis is true.

**To find the p-value for your test statistic:**

- Look up your test statistic on the appropriate distribution — in this case, on the standard normal (Z-) distribution (see the following Z-table).
- Find the probability that Z is beyond (more extreme than) your test statistic: