John davis, a manager of a supermarket, wants to estimate the proportion of customers who use food stamps at his store. he has no initial estimate of what the sample proportion will be. how large a sample is required to estimate the true proportion to within 3 percentage points with 98% confidence?

1509

Step-by-step explanation:

We know that, formula for number of samples is,

When nothing is given, we take and we know that .

SE = 0.03 (the true proportion should remain withing 3%)

Putting the values we get,

Therefore, the sample required to estimate the true proportion to within 3 percentage points is 1509.