first born children Total 14.4 First-born children tend to develop language skil
ID: 3315004 • Letter: F
Question
first born children Total 14.4 First-born children tend to develop language skills faster than their younger siblings. One possible explanation for this phenomenon is that first-borns have undivided attention from their parents. If this explanation is correct, then it is also reasonable that twins should show slower language development than single children and that triplets should be even slower. Davis (1937) found exactly this result. The following hypothetical data demonstrate the relationship. The dependent variable is a measure of language skill at age 3 for each child. Do the data indicate any significant differences? Test with = .05. Single Child Twin Triplet 10Explanation / Answer
Using Minitab:
Stat==> ANOVA (Unstructured)
One-way ANOVA: Single child, Twin, Triplet
Source DF SS MS F P
Factor 2 40.00 20.00 5.71 0.018
Error 12 42.00 3.50
Total 14 82.00
S = 1.871 R-Sq = 48.78% R-Sq(adj) = 40.24%
Individual 95% CIs For Mean Based on
Pooled StDev
Level N Mean StDev ---------+---------+---------+---------+
Single child 5 8.000 1.581 (--------*--------)
Twin 5 6.000 2.121 (--------*--------)
Triplet 5 4.000 1.871 (--------*--------)
---------+---------+---------+---------+
4.0 6.0 8.0 10.0
Pooled StDev = 1.871
P-value 0.018 < 0.05 we reject the null hypothesis. we conclude that there significance difference between.
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