A university claims that students can expect to spend a mean of 3 hours per week on homework for every credit hour of class. The administration believes that this number is no longer correct at a significance level of 0.05, and surveys a random sample of 300 students. The results of the sample are given below. 2 Mean Variance Observations Hypothesized Mean df t Stat poet) one-tail t Critical one-tail two-tail t Critical two-tail Homework time 3.158191551 1.248743026 300 3 299 2.451926089 0.007390564 1.649965767 0.014781127 1.967929669 3 t-statistic x: 1S543 2 Ex: o '845 3 p-value Since the p-value is than the significance level 0.05, the null hypothesis Pick v exist that the mean homework time per credit hour is different from 3 hours per Sufficient evidence