The population standard deviation for the heights of dogs, in inches, in a city is 3.8inches. If we want to be 95% confident that the sample mean is within 1 inch of the true population mean, what is the minimum sample size that can be taken?

z0.10	z0.05	z0.04	z0.025	z0.01	z0.005
1.282	1.645	1.751	1.960	2.326	2.576

Use the table above for the z-score, and be sure to round up to the nearest integer.