Inference#

Conditions for Inference#

TODO

A.P. Exam Practice#

  1. 2012, Free Response, #3

Independent random samples of 500 households were taken from a large metropolitan area in the United States for the years 1950 and 2000. Histograms of household size (number of people in a household) for the years are shown below.

../../../_images/2012_apstats_frp_03.png

Use this information to answer the following questions.

  1. Compare the distributions of household size in the metropolitan area for the years 1950 and 2000.

  2. A researcher wants to use these data to construct a confidence interval to estimate the change in mean household size in the metropolitan area from the year 1950 to the year 2000. State the conditions for using a two-sample t-procedure, and explain whether the conditions for inference are met.

TODO: MORE!!!