Refer to the website of the Automobile Association of Singapore and extract the past COE bidding prices for Category A cars from January 2021 to December 2021 as your sample size. Discuss the trend of the COE prices for Category A cars in the year 2021 and explain possible reasons for the current trend.
Given that COE prices are normally distributed with a population mean of $45,000 and a population standard deviation of $4,500, conduct a Hypothesis Test at a 5% significance level to comment and validate on the VALIDATION POINT B as stated in the case.
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