Module 4 Assessments A national internet service provider (ISP) claims that its broadband internet download speed is 275 megabits per second (Mbps) on average. To the contrary, there have recently been widespread reports that consumers are experiencing much slower download speeds from this ISP. A organization ogranization decided to investigate the issue. They took a random sample of 18 internet speeds from around the nation. The observations are given below. 272 231 288 256 252 226 274 279 243 236 235 273 274 242 282 292 274 277 Using a = 0.05, test the hypothesis that the average download speed is 275 Mbps, as advertised by the ISP. Assume that the distribution of all broadband internet download speed measurements from this ISP is approximately normally distributed. Use the critical value method. State the null and alternative hypothesis for this test. Ho : ? v H1: ? v Determine if this test is left-tailed, right-tailed, or two-tailed. left-tailed O right-tailed O two-tailed Should the standard normal (z) distribution or Student's (t) distribution be used for this test? The standard normal (z) distribution should be used O The Student's t distribution should be used Determine the critical value(s) for this hypothesis test. Round the solution(s) to four decimal places. If more than one critical value exists, enter the solutions using a comma-separated list