A doctor believes that the average age of single mothers is 20 years. A random sample of 10 single mothers was drawn from a Obstetrics Clinic. Their ages are 22, 17, 27, 20, 23, 19, 24, 18, 19, and 24 years.In a test to determine if we can infer at the 5% significance level that the population mean is not equal to 20, what is the research or alternative hypothesis?(d) H m = 20(c) H ? <>(b) H m <> (a) H ?
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