Nationally, social workers average 10.2 years of experience. In a random sample, 203 social workers in Lusaka average only 8.7 years, with a standard deviation of 0.52. a. Are social workers in Lusaka significantly less experienced? b. The same sample of social workers reports an average annual salary of K25,782, with a standard deviation of K622. Is this figure significantly higher than the national average of K24,509?

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