Chapter 19

Question 1

Statistical definition of Hypothesis.

Answer 1

A belief about a population parameter that will be stated before any data analysis.

Question 2

The statement being tested in a test of statistical significance is called the _________ ____________. Always has equality sign: =, <=, or >=. Symbol H₀.

Answer 2

Null Hypothesis.

Question 3

The statement that is being tested against the null hypothesis is the _________ ____________. Always has inequality sign: ¬=, <, or >. Symbol H_a.

Answer 3

Alternative Hypothesis.

Question 4

Probability of obtaining a test statistic more extreme (<= or >=) than actual sample value (z test) given H₀ is true.

Answer 4

p-Value.

Question 5

An alternative hypothesis is _____________ (H_A : p ≠ p₀ ) when we are interested in deviations in either direction away from the hypothesized parameter value.

Answer 5

two-sided.

Look at p < p₀ and p > p₀.

Question 6

An alternative hypothesis is _____________ (e.g., H_A: p > p₀ or H_A: p < p₀) when we are interested in deviations in only one direction away from the hypothesized parameter value.

Answer 6

one-sided.

Look at p > p₀ when H_A: p > p₀ and p < p₀ when H_A: p < p₀.