Imagine that you are a researcher who is interested in whether average job satisfaction differs among people who are short, average, or tall in height. You measure average job satisfaction, which is shown in the SPSS file as "jobsat". The variable was measured by asking people the following: All things considered, how satisfied are you with your main job? Responses ranged from 1 (completely dissatisfied) to 7 (completely satisfied). You also have people indicate whether they consider themselves to be short, tall, or average in height. This data is shown in the "height" variable in SPSS. Values are coded as follows: 1 = short 2 = average 3 = tall What is the null hypothesis for this research question? O There is no difference in mean job satisfaction across the three height groups