Solution :
Given :
National mean score of the reading test that is conducted the NAEP = 288
Standard deviation of the score = 38
Therefore, P(X > x) = 0.25
P (Z > 
= 0.674)
x = 326.67
Therefore, the highest score that is needed for the students to be in the top of 25 percent among the students those who take the exam.
Answer:
1) quadrants 1 and 3
2) quadrants 2 and 4
Step-by-step explanation:
A(7)=1
a(20)=25
a(25)=?
a(n)=a(1)+d(n-1)
a(7)=a(1) +6d=1 -11/13+6*24/13=
a(20)=a(1)+19d=-25
a(1) +6d=1
a(1)+19d=-25 (subtract first equation from the second)
---------------------
19d-6d =-26
13d =-26
d=-2
a(1)=1-6d=1-6*(-2)=13
a(25)= a(1)+d(25-1)= 13+(-2) *24= 13-48=-35
