The waiting time for customers at macburger restaurants follows a normal distribution with a population standard deviation of 1 minute. at the warren road macburger, the quality-assurance department sampled 50 customers and found that the mean waiting time was 2.75 minutes. at the 0.05 significance level, can we conclude that the mean waiting time is less than 3 minutes?

What is the smallest integer n such that n\sqrt{2} is greater than 20

Which region represents the solution to the given system of inequalities? |-0.5x+y23 | 1.5x+ys-1 5 4 -3 -2 -1 1 2 3 4

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.