6.43 More on finding significant z-scores. Consider a one-sided significance test for a population mean, where the alternative is “greater than.”
(a) Sketch a Normal curve similar to that shown in Figure 6.10, but find the value z such that P = 0.05.
(b) Based on your curve from part (a), what values of the z statistic are statistically significant at the α = 0.05 level?