lease use a .05 significance level for all the problems. Show all your work. When you perform a test, you should at least tell me what your hypothesis is, the test statistic and your conclusions based on your calculations. Are very young infants more likely to imitate actions that are modeled by a person or simulated by an object? This question was the basis of a research study summarized in the paper “The Role of Person and Object in Eliciting Early Imitation” (J. Experimental Child Rsych. (1991): 423 −433). One action examined was mouth opening. This action was modeled repeatedly by either a person or a doll, and the number of times that the infant imitated the behavior was recorded. Twenty-seven infants participated, with 12 exposed to a human model and 15 exposed to the doll. Summary values are given here. Is there sufficient evidence to conclude that the mean number of imitations for infants who watch a human model is different from the mean number of imitations for infants who watch a doll? Test the relevant hypotheses using a .05 significance level. Here we assume that the variances of the two groups are equal. Person model Doll model ̄x 5.14 3.46 s 1.6 1.3
6. please use a .05 significance level for all the problems. Show all your work.
When you perform a test, you should at least tell me what your hypothesis is, the test
statistic and your conclusions based on your calculations.
Are very young infants more likely to imitate actions that are modeled by a person
or simulated by an object? This question was the basis of a research study summarized in the
paper “The Role of Person and Object in Eliciting Early Imitation” (J. Experimental Child Rsych.
(1991): 423 −433). One action examined was mouth opening. This action was modeled repeatedly
by either a person or a doll, and the number of times that the infant imitated the behavior was
recorded. Twenty-seven infants participated, with 12 exposed to a human model and 15 exposed
to the doll. Summary values are given here. Is there sufficient evidence to conclude that the
number of imitations for infants who watch a human model is different from the mean number of
imitations for infants who watch a doll? Test the relevant hypotheses using a .05 significance level.
Here we assume that the variances of the two groups are equal.
Person model Doll model
̄x 5.14 3.46
s 1.6 1.3
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