For a two-tailed test with α = 0.05, what are the cutoff t values for a t-distribution with df = 9?

For a two-tailed test with α = 0.05, what are the cutoff t values for a t-distribution with df = 30?

A random sample of size 100 is selected from a population with p = .40.

(a) What is the expected value of p? (to 2 decimals)

(b) What is the standard error of p? (to 2 decimals)

(c) Show the sampling distribution of p. (to 2 decimals)

(d) What does the sampling distribution of p show?

A random sample of size 100 is selected from a population with p .40.

(a)What is the expected value of p? (to 2 decimals)

(b)What is the standard error of p? (to 2 decimals)

(c)Show the sampling distribution of p. (to 2 decimals)

sigma_p = 0.05

E(p) = 0.4

(d)What does the sampling distribution of p show?