CP Stats Quiz Normal Model Cohort A Name: Make sure to list the values and the percentages in the model below:
I
2. The Postmaster of a city's Post Office believes that a Normal model is useful in projecting the
number of letters which will be mailed during the day. They use a mean of 20,000 letters and a
standard deviation of 250 letters. Draw and clearly label this model.
From the Model in #1, what percent of days would you expect to be:
2. Below 19,500 letters
3. Between 20,000 and 20,750
4. Above 20,250 letters
5. Use Z-Scores to determine the solution: