It is desired to estimate the mean number of hours of continuous use until a printer overheats. If it can be assumed tha
Posted: Sun Jul 03, 2022 11:22 am
It is desired to estimate the mean number of hours of continuous use until a printer overheats. If it can be assumed that σ = 4 hours, how large a sample is needed so that one will be able to assert with 95% confidence that the sample mean is off by at least 15 hours?