Factor completely 3x2 + 9x − 54. (3x − 9)(x + 6) 3(x − 3)(x + 6) (3x − 6)(x + 9) 3(x − 2)(x + 9)

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

D. in a discrete probability distribution, the sum of the probabilities for the discrete variables will be > 1. true or false