Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.33 and a standard deviation of 1.5. Using the empirical rule, what percentage of American women have shoe sizes that are no more than 11.33? Please do not round your answer.

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?

Average acceleration: i have no idea how to do this.

Write the rational number in lowest terms 99/-15