A population standard deviation is estimated to be 13. We want to estimate the population mean within 1.7, with a 90-percent level of confidence. What sample size is required? For full marks round...

A population standard deviation is estimated to be 13. We want to estimate the population mean within 1.7, with a 90-percent level of confidence. What sample size is required? For full marks round your answer up to the next whole number.
ISample size: 0