Critical Value Calculator

Get the critical values associated with a particular significance level (alpha) and statistical distributions with the critical value calculator.

The calculator functions to provide left-tailed, right-tailed, and two-tailed P values for Chi-square, T, F, R, and Z score values that help you better judge the critical points of the given probability density function.

What Is a Critical Value?

A critical value is said to be as a line on a graph that divides a distribution graph into sections that indicate ‘rejection regions.’ Generally, if a test value falls into a rejection rejoin, then it means that an accepted hypothesis (represent as a null hypothesis) should be rejected.

Left-tailed: Q (α)

Right-tailed: Q (1 - α)

Two-tailed: Q (α/2)] ∪ Q (1 - α/2)

How to Calculate Critical Value With This Tool

Simply, you just have to follow the given steps:

Find Critical Value for T

Inputs:

• At first, you ought to select the option “Critical value for t” from the drop-down list
• Now, you just have to add the value of the “significance level” into the designated field
• Finally, you have to add the value of “degrees of freedom” into the designated field

Outputs: After adding values into the above fields, just hit the calculate button:

• Critical value for t (Right Tailed)
• Critical value for t (Two Tailed)

Find Critical Value For Z

Inputs:

• You just have to choose the option “Critical value for z” form the drop-down menu of this tool
• Right after, you ought to add the value of the “significance level” into the given box

Outputs: Now, hit the calculate button, this z value calculator will show:

• Critical value for z (Right Tailed)
• Critical value for z (Two Tailed)

Find Critical Value for Chi-Square

Inputs:

• First, choose the option “Critical value for chi-square” form the list of drop-down
• Then, simply add the value for a “significance level” into the above-designated box
• Very next, add the value for a “degrees of freedom” into the given field of calculator

Outputs: Now, you have to make a click on the calculate button to calculate chi square value for the distribution, the tool generates:

• Chi-Square critical value (Right Tailed)
• Chi-Square critical value (Two Tailed)
• P value (for the chi square distribution)

Find Critical Value For F

Inputs:

• First, choose the option of “Critical value for f” from the given drop-down menu
• Very next, you have to enter the value of a “degrees of freedom 1” into the designated field
• Right after, you ought to add the value of a “degrees if freedom 2” into the given box
• Finally, put the value of “significance level” into the designated box

Outputs: Once done, click on the calculate button, this f value calculator will generate:

• Critical value f (Right Tailed)
• Critical value f (Two Tailed)

Z Score Table (Right):

The z-table is the normal distribution shows the area to the right-hand side of the curve. You can use these values to determine the area between z=0 and any positive (+) value.

Div:

Z Score Table (Left):

The left z-table shows the area to the left of Z.

Div:

T Critical Value Table (One Tail):

T Critical Value Table (Two Tails)

References:

From Wikipedia, the free encyclopedia – statistical test (z test) – calculate the standard score – examples – standard deviation of the scores – Next, calculate the z-score