It is scientifically documented that yawning is contagious. When we see someone else yawn, or even think about someone yawning, we are very likely to yawn ourselves. (In fact, we predict that you are starting to want to yawn right now.) In a study of yawning contagion, researchers showed participants one of several pictures, including a picture of a man yawning, the same man smiling, a yawning man with his mouth covered, or a yawning man with his eyes obscured (Provine et al. 1989). Participants yawned much more often when shown the yawner than the smiler, but surprisingly an identical number also yawned when shown the picture with the mouth obscured. This suggests that something besides the mouth is an important trigger. What about the eyes? Seventeen of 30 participants yawned when confronted with a picture of a yawning man, while 11 of 30 independent participants yawned when shown a picture of a yawning man with his eyes covered. Is there evidence in these data that covering the yawning man's eyes in an image changes the occurrence of contagious yawns? To answer this question, perform the x contingency test. The null and alternative hypotheses are as follows: Họ: Covering the eyes and frequency of yawning are independent. HA: Covering the eyes and frequency of yawning are not independent. State the conclusion and the interpretation of the x contingency test. Fail to reject Ho. There is sufficient evidence at the level of significance a = 0.05 that the probability of yawning is contingent on covering the eyes. Fail to reject Ho. There is insufficient evidence at the level of significance a = 0.05 that the probability of yawning is contingent on covering the eyes. Reject Ho. There is insufficient evidence at the level of significance a = 0.05 that the probability of yawning is contingent on covering the eyes. Reject Ho. There is sufficient evidence at the level of significance a = 0.05 that the probability of yawning is conting on covering the eyes.
It is scientifically documented that yawning is contagious. When we see someone else yawn, or even think about someone yawning, we are very likely to yawn ourselves. (In fact, we predict that you are starting to want to yawn right now.) In a study of yawning contagion, researchers showed participants one of several pictures, including a picture of a man yawning, the same man smiling, a yawning man with his mouth covered, or a yawning man with his eyes obscured (Provine et al. 1989). Participants yawned much more often when shown the yawner than the smiler, but surprisingly an identical number also yawned when shown the picture with the mouth obscured. This suggests that something besides the mouth is an important trigger. What about the eyes? Seventeen of 30 participants yawned when confronted with a picture of a yawning man, while 11 of 30 independent participants yawned when shown a picture of a yawning man with his eyes covered. Is there evidence in these data that covering the yawning man's eyes in an image changes the occurrence of contagious yawns? To answer this question, perform the x contingency test. The null and alternative hypotheses are as follows: Họ: Covering the eyes and frequency of yawning are independent. HA: Covering the eyes and frequency of yawning are not independent. State the conclusion and the interpretation of the x contingency test. Fail to reject Ho. There is sufficient evidence at the level of significance a = 0.05 that the probability of yawning is contingent on covering the eyes. Fail to reject Ho. There is insufficient evidence at the level of significance a = 0.05 that the probability of yawning is contingent on covering the eyes. Reject Ho. There is insufficient evidence at the level of significance a = 0.05 that the probability of yawning is contingent on covering the eyes. Reject Ho. There is sufficient evidence at the level of significance a = 0.05 that the probability of yawning is conting on covering the eyes.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 1C
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Transcribed Image Text:It is scientifically documented that yawning is contagious. When we see someone else yawn, or even think
about someone yawning, we are very likely to yawn ourselves. (In fact, we predict that you are starting to want to yawn right
now.) In a study of yawning contagion, researchers showed participants one of several pictures, including a picture of a man
yawning, the same man smiling, a yawning man with his mouth covered, or a yawning man with his eyes obscured (Provine et
al. 1989). Participants yawned much more often when shown the yawner than the smiler, but surprisingly an identical number
also yawned when shown the picture with the mouth obscured. This suggests that something besides the mouth is an
important trigger. What about the eyes? Seventeen of 30 participants yawned when confronted with a picture of a yawning
man, while 11 of 30 independent participants yawned when shown a picture of a yawning man with his eyes covered. Is there
evidence in these data that covering the yawning man's eyes in an image changes the occurrence of contagious yawns?
To answer this question, perform the x contingency test. The null and alternative hypotheses are as follows:
Họ: Covering the eyes and frequency of yawning are independent.
HA: Covering the eyes and frequency of yawning are not independent.
State the conclusion and the interpretation of the x contingency test.
Fail to reject Ho. There is sufficient evidence at the level of significance a = 0.05 that the probability of yawning is
contingent on covering the eyes.
Fail to reject Ho. There is insufficient evidence at the level of significance a = 0.05 that the probability of yawning is
contingent on covering the eyes.
Reject Ho. There is insufficient evidence at the level of significance a = 0.05 that the probability of yawning is
contingent on covering the eyes.
Reject Ho. There is sufficient evidence at the level of significance a = 0.05 that the probability of yawning is conting
on covering the eyes.
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