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The Empirical Rule is used with data that are:

The standard deviation of this sample 9 2 7 7 5 is ________.

Use the following information to answer the following question: A study conducted by Hershey’s discovered that Americans consumed an average of 11.4 pounds of chocolate per year. Let’s assume that the annual chocolate consumption follows the normal distribution with a standard deviation of 3.6 pounds What is the probability that a randomly selected American will consume less than 7lbs of chocolate next year?

The following data represents the number of days that 9 homes were on the market before being sold 20 35 45 50 52 63 75 79 96 The 70th percentile of this data set is

Suppose the average price for new cars in 2012 has a mean of $30,100 and a standard deviation of $5,600. Based on this information, what interval of prices would we expect at least 89% of new car prices to fall within? This distribution is not bell shaped. Write you answer like (lower limit, upper limit)

The first quartile represents the ________ percentile of the data set.

The ________ quartile represents the 50th percentile

A random sample of 2008 used cars for sale on the market has an average mileage of 71,420 miles with a sample standard deviation of 9,470 miles. The z-score for a used car with 80,500 miles in this sample is ________. Round to 2 decimal places

Use the Poisson Table to answer the following questions A particular intersection in Delaware is equipped with a surveillance camera. The number of traffic tickets issued to drivers passing through the intersection follows the Poisson distribution and averages 4.5 per month. Use this information to answers the following question: What is the probability that 5 or more traffic tickets will be issued at the intersection next month?

Chebyshev’s Theorem only applies to