The mean age of De Anza College students in a previous term was 28.6 years old. An instructor thinks the mean age for online students is older than 28.6. She randomly surveys 56 online students and finds that the sample mean is 29.4 years with a standard deviation of 2.1. Conduct a hypothesis test to determine if at the 5% significance the claim is true. Be sure to include your 1) Decision (reject or accept the null), 2) Reason for the decision and 3) Conclusion (write in a complete sentence)
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6 years old (μ ≤ 28.6) Alternative hypothesis (Ha): The mean age of online students is older than 28.6 years old (μ > 28.6) Show more…
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