STATISTICS HELP

Question

3. Which of the following statements is a null hypothesis?

Group of answer choices

A. There is no difference between the sample size and population size.

B. There are no statistical outliers in the sample.

C. The sample and population means are equal.

D. The sum of squared residual values in regression equals zero.

Answer 1

A. Either there is or there isn’t; not an inference problem. Did we sample every subject?

B. Ditto; we have the sample points. We can measure and count for outliers in the SAMPLE!

C. This is leading to a statistical inference about a POPULATION; we don’t know the population mean, but we have a sample mean so we are making a hypothesis about what the population parameter might be.

D. We can calculate SSR; no inference here.