Plotted individually using the '+' symbol. To the most extreme data points that are not considered outliers.

On each box, the central mark is the median (2nd quantile,Ģ5th and 75th percentiles (1st and 3rd quantiles, Box plots provide a visual comparison of the group The corresponding p-value of 0.3560 in the sixth column confirms this result.Īnova1 returns a box plot of the observations for each

A 95% confidence interval for the difference is, so you cannot reject the hypothesis that the true difference is zero. The third row shows that the differences in strength between the two alloys is not significant. Because the corresponding p-values (1.6831e-04 and 0.0040, respectively) are small, those differences are significant. The first two rows show that both comparisons involving the first group (steel) have confidence intervals that do not include zero. The sixth column shows the p-value for a hypothesis that the true difference of means for the corresponding groups is equal to zero. The third and fifth columns show the lower and upper limits for the 95% confidence intervals of the true difference of means. The fourth column shows the difference between the estimated group means. The first two columns show the pair of groups that are compared.

How to do an anova in excel