Answer Happy

Nationally, 38% of fourth graders cannot read an age-appropriatebook. The following data show the number of children, byage, identified as learning disabled under specialeducation. Most of these children have reading problemsthat should be identified and corrected before thirdgrade. Current federal law prohibits most children fromreceiving extra help from special education programs until theyfall behind by approximately two years’ worth of learning, and thattypically means third grade or later (USA Today,September 6, 2001).
Age
Number ofChildren
6
37,369
7
87,436
8
160,840
9
239,719
10
286,719
11
306,533
12
310,787
13
302,604
14
289,168
Question: Show that the probability distribution satisfiesequations Equation 5.1 which is f(x) ≥ 0 andEquation 5.2 which is Σ f(x) = 1.