Question

A streaming music site changed its format to focus on previously unreleased music from rising artists. The site manager now wants to determine whether the number of unique listeners per day has changed. Before the change in format, the site averaged 131,520 unique listeners per day. Now, beginning three months after the format change, the site manager takes a random sample of 30 days and finds that the site has an average of 124,247 unique listeners per day. SELECT THE TWO ANSWERS below that represent the correct null and alternative hypotheses.

μ=124,247μ=124,247

μ≠124,247μ≠124,247

μ≥124,247μ≥124,247

μ≤124,247μ≤124,247

μ=131,520μ=131,520

μ≠131,520μ≠131,520

μ≥131,520μ≥131,520

μ≤131,520

Answer 1