In a study of government financial aid for college students, it becomes necessary to estimate the percentage of full-time college students who earn a bachelor's degree in four years or less. find the sample size needed to estimate that percentage. use a0.04margin of error and use a confidence level of95%.assume that nothing is known about the percentage to be estimated. nequals=nothing(round up to the nearest integer.)

601

Step-by-step explanation:

When the prior estimate of the population proportion is unavailable , then the formula to find the sample size is given by :-

, where E = margin of error

and z* = Critical z-value associated with the confidence level.

As per given , we have

The prior percentage of full-time college students who earn a bachelor's degree in four years or less is not given.

E= 0.04

We know that the critical value for 95% confidence level = z*= 1.960

Then , the required sample size is given by :-

Hence, the required sample size is 601.

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225