Answer: 10 customers.
Step-by-step explanation:
The formula to find the required sample size :
(1)
, where p= prior population proportion.
n= sample size.
= Population standard deviation from previous studies.
Let p be prior population proportion of the customers who click on ads on their smartphones .
As per given , we have
p=0.62
E= 0.27
For 92% confidence , significance level : 
The critical value of z for 92% confidence interval from z-table would be

Put theses values in the formula (1), we will get


Therefore , the company should survey 10 customers .
I think the answer is B) i’m not 100%
Answer:
Likely
Step-by-step explanation:
It is very likely that you will pick a blue marble because the bag is mostly filled with blue marbles so even if it is random it is more probable
Answer:
i cant see the graph
Step-by-step explanation: