How do you do longhand

A consumer group claims that the mean minimum time it takes for a sedan to travel a quarter mile is greater than 14.5 seconds. A random sample of22 sedans has a mean minimum time to travel a quarter mile of 15.4 seconds and a standard deviation of 2.08 seconds. At a: [1.01 is there enough evidence to support the consumer group's claim? Complete parts {a} through {d} below. Assume the population is normally distributed. [a] Identify the claim and state H1] and HE. Hu= EEC Ha= EEC [Type integers or decimals. Do not round.) The claim is the E hypothesis