Normal Distribution Assignment

the suggest lengths of the cuts on a cd are 135 seconds. this allows the disk jockeys to have a great deal of time for commercials inside each 10-minute part. assume the distribution of the dimensions of the cuts follows the traditional distribution with a inhabitants regular deviation of eight seconds.

suppose we select a sample of 16 cuts from quite a few CDs. 1.what can we’re saying regarding the sample of the distribution suggest? 2.what is the regular error of the sample?three. what share of the sample means will in all probability be larger than 140 seconds?4. what per cent of the sample means will in all probability be larger tan 128 seconds?5. what p.c of the samples will in all probability be larger than 128 nevertheless decrease than 140 seconds?