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Rainfall. Statistics from Cornell's Northeast Regional Climate Center indicate that Ithaca, NY, gets an average of 35.4" of rain each year, with a standard deviation of 4.2". Assume that a Normal model applies.
a) During what percentage of years does Ithaca get more than 40" of rain?
b) Less than how much rain falls in the driest 20% of all years?
c) A Cornell University student is in Ithaca for 4 years. Let represent the mean amount of rain for those 4 years. Describe the sampling distribution model of this sample mean, y.
d) What's the probability that those 4 years average less than 30" of rain?
Steve then conducts a one-sample t-test on the data, knowing that there is an established mean for the publication of others that have taken this test of 6.
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Construct a 95 percent confidence interval for the true mean.
a new york state license plate contains 3 capital letters followed by 4 digits. there are 26 capital letters in the
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To estimate the true proportion of students who abstain from alcohol at LBCC, you will need to take a simple random sample.
what do your answers in parts a, c, d, and e imply about diversification?
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