Historically, a certain region has experienced 97 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 six years, the mean number of thunder days is 73 with a standard deviation of 29. Can you conclude that the mean number of thunder days is less than 97? Use the  level of significance. A)No. There is insufficient evidence to conclude that the number of thunder days is less than 97. B)There is not enough information to draw a conclusion.   C)Yes. The number of thunder days appears to be less than 97.

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