Answer:
121
Step-by-step explanation:
Given data as per the question
Standard deviation = [tex]\sigma[/tex] = 840
Margin of error = E = 150
Confidence level = c = 95%
For 95% confidence, z = 1.96
based on the above information, the minimum number of clients surveyed by the travel agent is
[tex]n = (\frac{z\times \sigma}{E})^2[/tex]
[tex]= (\frac{1.96\times 840}{150})^2[/tex]
= 120.47
= 121
hence, the 121 number of clients to be surveyed
Therefore we applied the above formula to determine the minimum number of clients
