What is the name for the group of elements indicated by the shaded portion of the periodic table? 
Definitions:
Fixed Number of Trials
A specified, constant number of attempts or operations conducted in an experiment or process, typically used in statistical trials.
Chi-Squared Distribution
A statistical distribution that represents the distribution of the sum of the squares of k independent standard normal random variables.
Skewed to the Right
A description of a distribution of data where the right tail (higher values) is longer than the left tail, indicating a concentration of lower values.
Critical Region
The critical region is a set of values for which the null hypothesis is rejected in hypothesis testing; it specifies the threshold at which the observed results are deemed statistically significant.
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