Historically, a Certain Region Has Experienced 65 Thunder Days Annually $\alpha = 0.01$

question 74

Multiple Choice

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 $\alpha = 0.01$ level of significance and assume the
Population is approximately normal.

• A) There is not enough information to draw a conclusion.
• B) Yes. The number of thunder days appears to be less than 65.
• C) No. There is insufficient evidence to conclude that the number of thunder days is less than 65.

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Definitions:

Ayn Rand

was a Russian-American writer and philosopher known for developing a philosophical system called Objectivism and for her novels "The Fountainhead" and "Atlas Shrugged."

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Soviet political leader who governed the Soviet Union from the mid-1920s until his death in 1953, known for his totalitarian rule.

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The 33rd president of the United States, known for his leadership during the final stages of World War II and the early years of the Cold War.

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Individuals who were recognized as nationals of the Soviet Union, a federal socialist state in Eurasia that existed from 1922 to 1991.