Question

1.)You are curious about how people feel about craft beer, so you gather data from 55 people in the city on whether or not they like it. You code your data so that 0 is neutral, positive scores indicate liking craft beer, and negative scores indicate disliking craft beer. You find that the average opinion was X̅ = 1.10 and the spread was s = 0.40, and you test for a difference from 0 at the α = 0.05 level.

2.)

You are part of a trivia team and have tracked your team’s performance

since you started playing, so you know that your scores are normally

distributed with μ = 78 and σ = 12. Recently, a new person joined the team,

and you think the scores have gotten better. Use hypothesis testing to see if

the average score has improved based on the following 8 weeks’ worth of

score data: 82, 74, 62, 68, 79, 94, 90, 81, 80.

Answer 1