The population standard deviation for the scores of a standardized test is 4 points. If we want to be 90% confident that the sample mean is within 1 point of the true population mean, what is the minimum sample size that should be taken?z0.10z0.05z0.025z0.01z0.0051.2821.6451.9602.3262.576Use the table above for the z-score, and be sure to round up to the nearest integer.