Statistics Solutions

[Solution] An investigator in child development research is studying the development of object permanence - the understanding that an object still exists

Question: An investigator in child development research is studying the development of object permanence – the understanding that an object still exists even if it is out of sight. She tests three groups of infants – ten 9-month-olds, ten 12-month-onld, and 10 15-month-olds. She presents each of the 30 infants with 10 trials, On each trial, a toy is first shown to the child and then covered with a piece of cloth. The infant demonstrates object permanence if he or she looks for the object or shows signs of distress when it’s covered. Each infant is given a score of the number of trials (out of 10) on which he or she shows object permanence. Here are the scores:

9 Months
12 Months 15 Months
8 10 10
3 5 8
4 6 9
6 7 9
5 6 8
4 5 7
9 10 9
2 3 6
0 3 6
1 3 8

Determine whether there were group differences in object permanence, and do all pairwise comparisons with the LSD and your F significant.

Price: $2.99
Solution: The downloadable solution consists of 3 pages
Deliverable: Word Document


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