Mathematics, 23.03.2020 22:48 ayoismeisjjjjuan
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? Use the a = 0.01 level of significance.
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Historically, a certain region has experienced 65 thunder days annually. (A "thunder day" is day on...
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