In Chapter 9, we described a study showing that newborn infants spend more time looking at attractive faces when they are shown together with less attractive faces (Slater, et al., 1998). In the study, a pair of faces is shown on a screen and the researchers record the amount of time the baby spends looking at each face. In a sample of n = 40 infants, suppose that 26 spent the majority of their time looking at the more attractive face and only 14 spent the majority of time looking at the unattractive face. Is this result significantly different from what would be expected if there were no preference between the two faces? Test with a = .05.
Answer to relevant QuestionsFord and Torok (2008) found that motivational signs were effective in increasing physical activity on a college campus. Signs such as "Step up to a healthier lifestyle" and "An average person burns 10 calories a minute ...Define the concept of sampling error and explain why this phenomenon creates a problem to be addressed by inferential statistics. Find each of the following values for the distribution shown in the following polygon. Data from the department of motor vehicles indicate that 80% of all licensed drivers are older than age 25. a. In a sample of n = 60 people who recently received speeding tickets, 38 were older than 25 years and the other 22 ...The color red is often associated with anger and male dominance. Based on this observation, Hill and Barton (2005) monitored the outcome of four combat sports (boxing, tae kwan do, Greco-Roman wrestling, and freestyle ...
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