A study was conducted by Joseph Jacobson and Diane Wille to determine the effect of early child care on infant-mother attachment patterns.5 In the study, 93 infants were classified as either "secure" or "anxious" using the Ainsworth strange-situation paradigm. In addition, the infants were classified according to the average number of hours per week that they spent in child care. The data appear in the accompanying table.
|
Attachment Pattern
|
Low
(0-3 hours)
|
Moderate
(4-19 hours)
|
High
(20-54 hours)
|
|
Secure Anxious
|
24
11
|
35
10
|
5
8
|
a. Do the data indicate a dependence between attachment patterns and the number of hours spent in child care? Test using α = .05.
b. Give bounds for the attained significance level.