A marketing consultant is hired by a major restaurant chain that wants to investigate the preferences and spending patterns of lunch customers The CEO of the chain hypothesized that the average customer spends at least 13 50 on lunch A survey of 25 customers sampled at one of the restaurants found the average lunch bill per customer to be x 14 50 Based on previous surveys the restaurant informs the marketing manager that the standard deviation is o 3 50 To address the CEO s conjecture the marketing manager decides to carry out a test of significance The null hypothesis should be Hou 14 50 Hou 13 50 oooo Hou 14 50 H 13 50