Problem 1

  1. 1.73
  2. 2.08
  3. 0.052
  4. 0.08

Problem 5

  1. Wrong, we re 95% sure that the true mean weight of these cows lies between the interval.
  2. Wrong, not gain, but full weight, individual cows
  3. Wrong, we already have study gains, not population
  4. Wrong, there is a true value for mean weight gain we dont know
  5. Wrong, there is a 95% chance that any sample that extends two standard errors from sample mean will contain true value

Problem 9

  1. The true value for heartrate lies between that intveral, which we have 95% confidence in
  2. 1.8
  3. Larger, since the interval would have to encompass more values to increase confidence that the true proportions lies within it.

Problem 13

  1. Yes, random, 10%, Histogram rtoughly fits model
  2. 98.06,98.51
  3. 98% confident the true vlue is between those numbers
  4. 98% of all samples that increase reach to same number of standard errors will contain the true value
  5. a little less than 98.6 degrees