Are very young infants more likely to imitate actions that aremodeled by a person or simulated by an object? This question wasthe basis of a research study. One action examined was mouthopening. This action was modeled repeatedly by either a person or adoll, and the number of times that the infant imitated the behaviorwas recorded. Twenty-seven infants participated, with 12 exposed toa human model and 15 exposed to the doll. Summary values are shownbelow.
| Person Model | Doll Model |
|---|
x | 5.10 | 3.48 |
| s | 1.60 | 1.30 |
Is there sufficient evidence to conclude that the mean number ofimitations is higher for infants who watch a human model than forinfants who watch a doll? Test the relevant hypotheses using a 0.01significance level. (Use a statistical computer package tocalculate the P-value. Use ?Person ??Doll. Round your test statistic to two decimalplaces, your df down to the nearest whole number, and yourP-value to three decimal places.)
t=
df=
P-value=
State your conclusion.
We reject H0. We do not have convincingevidence that the mean number of imitations is higher for infantswho watch a human model than for infants who watch a doll.
We do not reject H0. We have convincingevidence that the mean number of imitations is higher for infantswho watch a human model than for infants who watch adoll.   Â
We reject H0. We have convincing evidencethat the mean number of imitations is higher for infants who watcha human model than for infants who watch a doll.We do not rejectH0.
We do not have convincing evidence that the mean number ofimitations is higher for infants who watch a human model than forinfants who watch a doll.
