Final answer:
The statement that Ü, σ, σ, and σ² are all sample statistics is True. They represent the sample mean, standard deviation, and variance respectively.
Step-by-step explanation:
Ü, σ, σ, and σ² are indeed all sample statistics used to summarize data.Ü, also known as sample mean, which represents the average of a set of data points in a sample. It is calculated by summing all the data points and dividing by the number of points. The symbol σ denotes the sample standard deviation, a measure of the amount of variation or dispersion in a set of data values. The term σ² stands for the sample variance, which is the square of the sample standard deviation. Because these statistics are derived from samples and not entire populations, the statement is True.