Answer:
22 days
Step-by-step explanation:
55 divided by 2.5=22 days
Answer:
B) 454.50
Step-by-step explanation:
-25.50 + 480.00 = 454.50
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)