Stat 1040
Chapter 22 Solutions

  1. The estimate is 9.0 million and the estimates SE is 0.1 million (the half sample method).

    1. This is a probability sample because it is based on an objective chance process.
    2. It is not a simple random sample because only people from 2 districts will be chosen.

    1. This is a probability sample because it is based on an objective chance process.
    2. It is not a simple random sample because in a simple random sample there would be a chance that both the 17th and 18th could be in the sample - here that cannot happen.

    1. True
    2. True
    3. False - the normal curve doesn't work because the data are too skewed. (The confidence interval goes negative, and the percentage cannot be negative).