Question: Archaeology: Artifacts A child psychiatrist is studying the mental development of children. A random sample of nine children was given a standard set of questions appropriate to the age of each child. The number of irrelevant responses to the questions was recorded for each child. In the following data, x = age of child in years and y = number of irrelevant responses:

X 2 3 4 5 7 9 10 11 12

Y 15 15 12 13 11 10 8 6 5

Complete parts (a) through (c).

(d) If a child is 9.5 years old, what does the least-square line predict for the number of irrelevant responses?

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