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Lab8 - CE93 Engineering Data Analysis Prof Joan Walker...

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CE93 Engineering Data Analysis Prof. Joan Walker Spring 2011 1 CE93 Engineering Data Analysis Lab 8 Midterm Review Instructions: The following problems are planned for discussion during this week’s lab. To follow more closely with the discussion, please take a look at all the problems before coming to lab. There will be no lab reports to turn in this week. 1) The following data give the number of floods and number of earthquakes in a region for each decade over the past 50 years. In the following table, x denotes the number of floods; y denotes the number of earthquakes: X 3 7 5 1 4 Y 1 4 3 0 2 a. Construct a cumulative frequency diagram for x. What is the corresponding matlab code? b. Calculate the mean, median, and variance of y. c. Construct and comment on a scatter plot of y vs. x. d. Calculate the correlation between x and y. Is this consistent with the results in part d? 2) Weather records for a certain region indicate that there is a tendency for two hot summers to occur in a row. From the statistics for the region, the following information has been estimated: (i) The chance of any given summer being hot is 0.2; (ii)
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