At 95% confidence, how large a sample should be taken to obtain a margin of error of .03 for the estimation of the population proportion? assume past data are not available for developing a planning value for p*.

The sample should be 1,068.

Step-by-step explanation:

Consider the provided information.

Confidence level is 95% and margin of error is 0.03.

Thus,

1-α=0.95

α=0.05, E=0.03 and planning value

Formula to calculate sample size is:

From the table we can find:  

Substitute the respective values in the above formula we get:

Hence, the sample should be 1,068.

r and t.

both are 64 degrees.