A journal published an article on vocalized laughter among deaf users of America

Question

A journal published an article on vocalized laughter among deaf users of American Sign Language (ASL). In videotaped ASL conversations among deaf participants, 27 laughed at least once. The researchers wanted to know if they laughed more as speakers (while signing) or as audience members (while listening). For each of the 27 deaf participants, the number of laugh episodes as a speaker and the number of laugh episodes as an audience member were determined. One goal of the research was to compare the mean numbers of laugh episodes of speakers and audience members. Choose the correct statement below. O A. Since the samples are paired, they are not independent O B. Since the samples are large, the central limit theorem guarantees a normal distribution. OC. A paired difference experiment is easier to conduct than any other experiment D. Comparing paired differences is better than comparing the population means.

Explanation / Answer

Solution: We have paired sample under consideration and in this case the sample observations are dependent.

Therefore the option A is correct Since the samples are paired, they are not independent

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