The claim that 20% of Americans know their credit score is tested. Suppose that the sample (1 point) evidence causes us to fail to reject the null hypothesis claim that 20% of Americans know their credit score. State the final conclusion in simple, nontechnical terms.

Question

a. There is sufficient evidence to support the claim that the percentage of Americans who know their credit score is equal to 20

b. There is not sufficient evidence to reject the claim that the percentage of Americans who know their credit score is equal to 20%.

c. There is not sufficient evidence to support the claim that the percentage of Americans who know their credit score is not equal to 20%.

d. There is not sufficient evidence to support the claim.

My answer: d. There is not sufficient evidence to support the claim.

Pls help, Ill try to solve it correctly

Answer 1

correct answer is b
There is not sufficient evidence to reject the claim that the percentage of americans who know their credit score is equal to 20%

Answer 2

Anon is right. Full answers are;
a) z=-2.33
c) z=±2.81
b) 0.1056; fail
a) There is sufficient evidence to reject the claim that the percentage of Americans who check their mail every day is equal to 90%.
b) z=2.05
b) z=2.56
c) H0:p=0.5; H1:p>0.5
a) z=2.31
c) 0.0060; reject the null
b) There is not sufficient evidence to reject the claim that the percentage of Americans who know their credit score is equal to 20%.