Additional Information and Full Hypothesis Test Examples · Exercise 45

For each of the word problems, use a solution sheet to do the hypothesis test. The solution sheet is found in. Please feel free to make copies of the solution sheets. For the online version of the book, it is suggested that you copy the.doc or the.pdf files.

A statistics instructor believes that fewer than 20% of Evergreen Valley College (EVC) students attended the opening night midnight showing of the latest Marvel Universe movie. The instructor surveys 84 students and finds that 11 of them attended the midnight showing.
At a 1% level of significance, an appropriate conclusion is:

(a) There is insufficient evidence to conclude that the percent of EVC students who attended the midnight showing of Marvel Universe is less than 20%.
(b) There is sufficient evidence to conclude that the percent of EVC students who attended the midnight showing of Marvel Universe is more than 20%.
(c) There is sufficient evidence to conclude that the percent of EVC students who attended the midnight showing of Marvel Universe is less than 20%.
(d) There is insufficient evidence to conclude that the percent of EVC students who attended the midnight showing of Marvel Universe is at least 20%.

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Introductory Statistics 2e · §9.5 Additional Information and Full Hypothesis Test Examples · Exercise 45