=====Mathematics 341 - Fall 2013=====

====Homework====

**Chapter 6**

Exercise: 6.4

Also:

  - The web site [[http://lib.stat.cmu.edu/DASL/Datafiles/DraftLottery.html|here]] has a table with the results from the lottery for the 1970 draft. Each day of the year was assigned a draft number and eligible males were drafted in the order of their birth dates. Fit a least squares line to the data and plot the line with the scatterplot of the data. Does the line indicate any trend?
  - Young's modulus is a measurement of the stiffness of an elastic material. The following table lists observed values of Young's modulus for sapphire rods  measured at various temperature (in degrees Kelvin):

^ Temperature ^ Young's Modulus ^
|  500|  328|
|  550|  296|
|  600|  266|
|  603|  260|
|  603|  244|
|  650|  240|
|  650|  232|
|  650|  213|
|  700|  204|
|  700|  203|
|  700|  184|
|  750|  174|
|  750|  175|
|  750|  154|
|  800|  152|
|  800|  146|
|  800|  124|
|  850|  117|
|  850|  94|
|  900|  97|
|  900|  61|
|  950|  38|
|  1000|  30|
|  1000|  5|

Fit a least squares line to the data and plot the line with the scatterplot of the data.