e- and Two-Tailed Significance Tests for a Sin. SUBMIT ANSWER NEXT Question 6 of

Question

e- and Two-Tailed Significance Tests for a Sin. SUBMIT ANSWER NEXT Question 6 of 10 Multiple Choice: Please select the best answer and click "submit." Management at a sparkling water factory has designed a new system it thinks will lower the proportion, currently at.12, of incorrectly labeled bottles. In the year following the implementation of the new system, quality control engineers randomly sample 378 bottles and find 40 that are labeled incorrectly. Which of these hypotheses tests whether the proportion of incorrectly labeled bottles has decreased? A Ho:P Ha. Po B. Ho: p = .12 Ha: P

Explanation / Answer

ANSWER: is option B

(B)

He has given the research hypothesis currently 0.12(12%) of incorrectly labeled bottles

Ho : Phat = 0.12 against

Ha Phat <0.12

Here Phat is the population proportion

Sample proportion is phat = 40/378 = 0.106

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