Salvatore is discussing the issue of aging and death with some of his classmates. "I don't know about the rest of you," he says, "but I think that we're all born with a predetermined amount of time that we are going to live, and there isn't much we can do to extend that time.". Salvatore seems to be a proponent of ____ theories of aging

Which of the following accurately describes the chi-square test for independence?

a. It is similar to a single-sample t test because it uses one sample to test a hypothesis about one population. b. It is similar to a correlation because it uses one sample to evaluate the relationship between two variables. c. It is similar to an independent-measures t test because it uses separate samples to evaluate the difference between separate populations. d. It is similar to both a correlation and an independent-measures t test because it can be used to evaluate a relationship between variables or a difference between populations.

One sample has a variance of s2 = 10 and a second sample has a variance of s2 = 6.If the two samples have the same number of scores, what is the pooled variance for the two samples?

A) ?4 B) ?8 C) ?14 D) ?16