4) In testing the claim about the mean annual income of full-time college students is below $15,000, a random sample of 40 students were selected. The sample mean is $14,450 and sample standard deviation is $2025. Based on an appropriate hypothesis test, what is the correct conclusion at 0.01 significance level? O a. Sample provides sufficient evidence to support the claim that the mean income is below $15,000. b. Sample does not provides

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