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Google became a publicly traded company in August 2004. Initially, the stock traded over 10 million shares each day! Since the initial offering, the volume of stock traded daily has decreased substantially. In 2010, the mean daily volume in Google stock was 5.44 million shares, according to Yahoo!Finance. A random sample of 35 trading days in 2014 resulted in a sample mean of 3.28 million shares with a standard deviation of 1.68 million shares. Does the evidence suggest that the volume of Google stock has changed since 2007? Use a 0.05 level of significance.
Find the distribution of Tn, and compute E Tn and Var Tn. Remark. Customers arriving (and leaving) while the ATM is busy thus do not affect the service time.
Consider the consumer price index which is published by the government (or its statistical agency). Find out: what weights are used in the calculation.
Suppose that 34% of people have a dog, 19% of people have a cat, and 9% of people on both. What is the probability that someone owns a dog or a cat?
1. What is the current status of the housing stock in the county?
according the the u.s. department of education full-time graduate students receive an average salary of 12800. the dean
Describe your answer to a person who has never had a course in statistics.
Why did radio shack fails and the best buy succeed? Provide as much details possible
When the x's are equally spaced, the calculation of and can be simplified by coding the x's by assigning them the values ... , -3, -2, -1, 0, 1, 2, 3, ... when n is odd, or the values ... , -5, -3, -1, 1, 3, 5, ... when n is even. Show that with..
a. What is the expected wait time for a hat before the sewing starts? b. What is the average time to get a hat monogramed (wait time plus sewing)? c. What is the average number of hats waiting to start the monogram?
Physical Sciences Energy companies assess potential basin and formations for recoverable shale oil and gas resources.
One man can fix a machine in four hours and two men working together can fix a machine in three hours. The total maintenance cost (including downtime cost) in the case of two repairmen on duty is:
Using the standard deviation estimate of 1.8 from her earlier analysis, how large a sample must she take if she wants the margin of error to be under 0.5 inch?
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