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38. Rainfall. Statistics from Cornells Northeast
Chapter 18, Problem 38(choose chapter or problem)
38. Rainfall. Statistics from Cornells Northeast RegionalClimate Center indicate that Ithaca, NY, gets an averageof 35.4" of rain each year, with a standard deviation of4.2". Assume that a Normal model applies.a) During what percentage of years does Ithaca get morethan 40" of rain?b) Less than how much rain falls in the driest 20% of allyears?c) A Cornell University student is in Ithaca for 4 years.Let represent the mean amount of rain for those4 years. Describe the sampling distribution model ofthis sample mean, .d) Whats the probability that those 4 years average lessthan 30" of rain?
Questions & Answers
QUESTION:
38. Rainfall. Statistics from Cornells Northeast RegionalClimate Center indicate that Ithaca, NY, gets an averageof 35.4" of rain each year, with a standard deviation of4.2". Assume that a Normal model applies.a) During what percentage of years does Ithaca get morethan 40" of rain?b) Less than how much rain falls in the driest 20% of allyears?c) A Cornell University student is in Ithaca for 4 years.Let represent the mean amount of rain for those4 years. Describe the sampling distribution model ofthis sample mean, .d) Whats the probability that those 4 years average lessthan 30" of rain?
ANSWER:Step 1 of 5
Given that,
The average rainfall in each year=35.4
The standard deviation of rainfall in each year=4.2