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OpenStax, Introductory Statistics 2e §9.2 Outcomes and the Type I and Type II Errors · Exercise 14 · Statistics · Hypothesis testing

Outcomes and the Type I and Type II Errors · Exercise 14

A statistics instructor believes that fewer than 20% of Evergreen Valley College (EVC) students attended the opening midnight showing of the latest Marvel Universe movie. The instructor surveys 84 students and finds that 11 of them attended the midnight showing. The Type I error is to conclude that the percent of EVC students who attended is ________.

(a) at least 20%, when in fact, it is less than 20%.
(b) 20%, when in fact, it is 20%.
(c) less than 20%, when in fact, it is at least 20%.
(d) less than 20%, when in fact, it is less than 20%.

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OpenStax, Introductory Statistics 2e · §9.2 Outcomes and the Type I and Type II Errors · Exercise 14

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