As of​ 2011, the following are the ages at which a​ country's presidents were inaugurated. Construct a grouped frequency distribution for the data. Use 41​ - 45 for the first class and use the same width for each subsequent class.

Age: 41-45, 46-50, 51-55, 56-60, 61-65, 66-70

What are all these ages frequency's?

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

Does the point (1, sqrt 7) lie on circle shown.

Which of the following disjunctions is true? 4 + 4 = 16 or 6 - 5 = 11 4 · 3 = 7 or 3 - 2 = 5 8 - 5 = 13 or 7 · 2 = 12 7 - 4 = 11 or 6 + 3 = 9