Statistical Skills Quiz

The null hypothesis is that the average amount of time spent by the office workers reading and deleting spam emails is equal to or less than 25 minutes per day. H_0: μ ≤ 25.

The alternative hypothesis is that the average amount of time spent by the office workers reading and deleting spam emails exceeds 25 minutes per day. H_1: μ > 25.

The test statistic used for this hypothesis test is the t-statistic. t = (χ̄ - μ) / (s / √n), where χ̄ is the sample mean, μ is the hypothesized population mean, s is the sample standard deviation, and n is the sample size.

<p>The critical value used for this hypothesis test at the 1% significance level is t_crit = t-distribution value with (n-1) degrees of freedom and α = 0.01.</p> Signup and view all the answers