Suppose the germination periods, in days, for grass seed are normally distributed. lfthe population standard deviation is 3 days, what minimum sample size is needed to be 90% confident that the sample mean is within 1 day ofthe true population mean? 20.10 Zoos Z0325 20.01 20.005 1.282 1.645 1.960 2.326 2.576 Use the table above for the zscore, and be sure to round up to the nearest integer