For a class project, statistics students asked students in their class (30 students) how many hours of sleep they had gotten the night before, and also recorded each student's sex. The students found that the average sleep hours for the 12 males in the class was 5.8 hours with a standard deviation of 1.5 and for the 18 females in the class the mean was 6.5 hours with a standard deviation of 1.2 hours. The distributions of sleep hours were fairly symmetric for both males and females. The students were interested in deciding whether males and females at their school tend to get different amounts of sleep on average. When applying the "3S strategy" to these data, the observed statistic is: Group of answer choices:
For a class project, statistics students asked students in their class (30 students) how many hours of sleep they had gotten the night before, and also recorded each student's sex. The students found that the average sleep hours for the 12 males in the class was 5.8 hours with a standard deviation of 1.5 and for the 18 females in the class the mean was 6.5 hours with a standard deviation of 1.2 hours. The distributions of sleep hours were fairly symmetric for both males and females. The students were interested in deciding whether males and females at their school tend to get different amounts of sleep on average.
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From the given information, the mean of the males is 5.8 and the mean of the females is 6.5
Observed difference is,
Correct option: 0.7 hours
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