Answer:
The number of surveys needed to be collected is 152.
Step-by-step explanation:
The (1 - <em>α</em>)% confidence interval for population proportion <em>p</em> is:
The margin of error for this interval is:
The information provided is:
Compute the critical value of <em>z</em> for 89.9% confidence level as follows:
*Use a <em>z</em>-table.
Compute the sample size value as follows:
Thus, the number of surveys needed to be collected is 152.