If you add a zero at the end it is easier to understand. 0.20 > 0.18 because 20 is greater than 18
Correct answer is a) 27 degrees.
Answer: (0.63, 7.07)
Step-by-step explanation:
The confidence interval for population proportion is given by :-

Given :
; 
Significance level : 
Critical value : 
Now, a 90% confidence interval for population proportion will be :-

Hence, a 90% confidence interval for population proportion = (0.63, 7.07)