# What does the Tukey-Kramer test tell us?

## What does the Tukey-Kramer test tell us?

The Tukey HSD (“honestly significant difference” or “honest significant difference”) test is a statistical tool used to determine if the relationship between two sets of data is statistically significant – that is, whether there’s a strong chance that an observed numerical change in one value is causally related to an …

## When would you use Tukey-Kramer test?

Tukey-Kramer test. If you reject the null hypothesis that all the means are equal, you’ll probably want to look at the data in more detail. One common way to do this is to compare different pairs of means and see which are significantly different from each other.

What is the null hypothesis for a Tukey test?

Tukey’s HSD is a multiple comparison technique that tests the null hypothesis that two means are equal.

What is a significant F value?

If you get a large f value (one that is bigger than the F critical value found in a table), it means something is significant, while a small p value means all your results are significant. The F statistic just compares the joint effect of all the variables together.

### Is Tukey a post hoc test?

The Tukey Test (or Tukey procedure), also called Tukey’s Honest Significant Difference test, is a post-hoc test based on the studentized range distribution. The test compares all possible pairs of means.

### Why would you use the Tukey-Kramer procedure?

Figure 1 – Data and ANOVA for Example 1 Since the sample sizes are unequal, we use the Tukey-Kramer test to determine which pairwise comparisons are significant.

What is the Tukey-Kramer test?

The most commonly used post hoc test is the Tukey-Kramer test, which compares the mean between each pairwise combination of groups. The following example shows how to perform the Tukey-Kramer test in Excel. Suppose we perform a one-way ANOVA on three groups: A, B, and C.

What is the Tukey-K Kramer post hoc test?

In order to see if any statistically significant differences in the means of 4 particular diets exist, a post-hoc test is conducted i.e. Tukey – Kramer. Could someone please explain to me the plot which is attached below?

#### What is Tukey’s test?

The test is known by several different names. Tukey’s test compares the means of all treatments to the mean of every other treatment and is considered the best available method in cases when confidence intervals are desired or if sample sizes are unequal ( Wikipedia ).

#### How many diets are in the Tukey- Kramer model?

Note: Tukey – Kramer is being used here as there is not equal observations between diets. There are 4 diets – which gives 6 possible pairwise comparisons between them: 1-2, 1-3, 1-4, 2-3, 2-4, and 3-4 (2-1 would be the same as 1-2, so we don’t count it twice).

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