Mathematics

Mathematics, 30.07.2019 03:10, cyni

Historically, a certain region has experienced 65 thunder days annually. (a "thunder day" is day on which at least one instance of thunder is audible to a normal human ear). over the past eleven years, the mean number of thunder days is 55 with a standard deviation of 20. can you conclude that the mean number of thunder days is less than 65?

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Social Studies, 30.10.2019 00:31, lanakay2006

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