In Maryland, social workers with a BA degree averaged 10.2 years of experience. Ina random sample, 203 social workers in Baltimore area averaged only 8.7 years, with a standard deviation of 0.52 years. Are social workers in Baltimore significantly less experienced that statewide social workers? Use 0.05 alpha level. Note: This is a one-tailed test. b.The same sample of social workers as discussed above reported an average annual salary of $25782, with a standard deviation of $622. Is this salary significantly higher than the statewide average of $24,509.
Compute the appropriate test statistics (z obtained and z critical) and decide whether to accept or reject the null hypothesis for each question. You should provide three answers: z obtained, z critical and whether you accept or reject the null hypothesis.
a. In Maryland, social workers with a BA degree averaged 10.2 years of experience. Ina random sample, 203 social workers in Baltimore area averaged only 8.7 years, with a standard deviation of 0.52 years. Are social workers in Baltimore significantly less experienced that statewide social workers? Use 0.05 alpha level. Note: This is a one-tailed test.
b.The same sample of social workers as discussed above reported an average annual salary of $25782, with a standard deviation of $622. Is this salary significantly higher than the statewide average of $24,509. Note: this is a one-tailed test.
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