# Math Help - Find a 90% one-sided upper confidence bound for the population mean μ for these value

1. ## Find a 90% one-sided upper confidence bound for the population mean μ for these value

Find a 90% one-sided upper confidence bound for the population mean μ for these values. (Round your answers to two decimal places.)

(a) n = 34, s2 = 66, x = 76

(b) n = 100, s = 2.5, x = 1.4

2. ## Re: Find a 90% one-sided upper confidence bound for the population mean μ for these v

Use $\displaystyle \bar{x}+Z_{1-\alpha}\times \frac{s}{\sqrt{n}}$

3. ## Re: Find a 90% one-sided upper confidence bound for the population mean μ for these v

How do I find Z1 and a?