Another industrial psychologist asks a group of 9 assembly-line workers and 11 workers not on an assembly line (but doing similar work) to indicate how much they like their jobs on a 9-point scale (9 = like, 1 = dislike). The results are as follows:

(a) Test the null hypothesis that there is no relationship between the assembly line variable and job satisfaction by computing r_pb and then using Table C to find the critical value. What should the psychologist decide?

(b) Calculate the corresponding t value using Formula 10.7, and then compute an estimate of omega squared (ω²) by using Formula 10.10. Does it look like there is a fairly large effect of job type on job satisfaction in the population?

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Assembly-line workers: Other workers: 4 4 4 3 4 7 3 3 3 6. 4+