Respuesta :
Use these facts to count the approximate area of the unshaded region:
1. [tex] Pr(Z\le 1)=0.8413 [/tex] (from the table);
2. [tex] Pr(Z\ge 1)=1-Pr(Z\le 1)=1-0.8413=0.1587 [/tex];
3. [tex] Pr(Z\le -2)=Pr(Z\ge 2) [/tex];
4. [tex] Pr(Z\le 2)=0.9772 [/tex] (from the table);
5. [tex] Pr(Z\ge 2)=1-Pr(Z\le 2)=1-0.9772=0.0228 [/tex];
6. [tex] Pr(Z\le -2)=0.0228 [/tex].
Then the approximate area of the unshaded region is [tex] A=0.0228+0.1587=0.1815 [/tex].
Answer: correct choice is C.
Answer:
0.18
0.81
89 percent
might not be in the correct order but it is the answer