Mathematics 341 - Fall 2013

Homework

Chapter 6

Exercise: 6.4

Also:

  1. The web site 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?
  2. 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.