Question

What is the minimum number of clients the travel agent should survey? Note that z=1.96 for a 95% confidence interval.

Answer 1

121

Explanation:

Given data as per the question

Standard deviation =
`\sigma` = 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

`n = ((z* \sigma)/(E))^2`

`= ((1.96* 840)/(150))^2`

= 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