<em>I believe that the answer should be A. </em>
Answer: option B
Step-by-step explanation: at alpha level of 5% for a two tailed test, the critical value is +1.96 and -1.96
At alpha level of 1% for a two tailed test, the critical value is +2.576 and -2.576
Relating z = 2.77 with these critical values, we can see that at 5% level of significance, z = 2.77 is greater than +1.96 which falls in the rejection region.
Also at 1% level of significance, we can see that z = 2.77 is greater than 2.576 which also falls in the rejection region.
Answer:
1. 45
2. 45
3. 90
4. 45
5. 45
6. 60
7. 60
8. 60
9. 60
10. 60
Step-by-step explanation:
Step-by-step explanation:
(x-4)(x^2+3x+5)
=(x^3+3x^2+5x-4x^2-12x-20)
=(x^3-x^2-7x-20)
Hope this helps!