Statistics Solutions

[Solved] Gestation Periods of Humans. Gestation periods of humans have a mean of 266 days and a standard deviation of 16 days. Let $y$ denote the variable

Question: Gestation Periods of Humans. Gestation periods of humans have a mean of 266 days and a standard deviation of 16 days. Let $y$ denote the variable "gestation period" for humans.

  1. Find the standardized variable corresponding to \(y\)
  2. What are the mean and standard deviation of the standardized variable?
  3. Obtain the z-scores for gestation periods of 227 days and 315 days. Round your answers to two decimal places.
  4. Interpret your answers in part (c).
  5. Construct a graph similar to Fig. 3.15 on page 138 that shows your results from parts (b) and (c).

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