One might conclude that the daily number of 60-99 years old COVID cases is significantly different in the months of February versus March versus April for a city. Is this a valid argument? Why? February has 1 record, March has 3500 records and April has 8800 records. Which statistical test can be applied for these samples of unequal sizes? How can the power of the test

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1. One might conclude that the daily number of 60-99 years old COVID cases is significantly different in the months of February versus March versus April for a city. Is this a valid argument? Why?

February has 1 record, March has 3500 records and April has 8800 records.

Which statistical test can be applied for these samples of unequal sizes? How can the power of the test be determined? I'm sorry this question cannot be posted as two different questions. Please help me! Thanks!

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