Question

2. What is sampling variability?

Answer 1

Sampling variability is how much an estimate varies between samples.

Explanation:

“Variability” is another name for range; Variability between samples indicates the range of values differs between samples. ... The variance (σ2) and standard deviation (σ) are common measures of variability

(ATTACHED IMAGE FOR EXAMPLE)

(credit to google)

Answer 2

Explanation:

remove parentheses by multiplying factors

use exponent rules to remove parentheses in terms with exponents

combine like terms by adding coefficients

combine the constants