Suppose in large City A that the average number of homicides is 98 per year, with a standard deviation of 25. In midsized City B, the average number of homicides is 44, with a standard deviation of 17
In 2012, City A had 119 homicides, while City B recorded 62 homicides. Assuming both distributions are normal, calculate the following using the Table A in Appendix C:
1. Which city had the worst number of homicides in 2012 (relative to its norm)?
2. Compute the percentile rank of City A's 2012 homicides.
3. Compute the percentile rank of City B's 2012 homicides.
4. If City B had 33 homicides in 2010, what percentage greater were the homicides in 2012?
Assume the probabilities of a child being allergic to the following foods are as follows:
.014 for nuts
.043 for dairy
.031 for gluten
1. Calculate the probability that a child is NOT allergic to nuts.
2. Calculate the probability that a child is NOT allergic to dairy and NOT allergic to gluten.
3. Calculate the probability that a child is allergic to nuts or is allergic to dairy or is allergic to gluten.
4. Calculate the probability that a child is allergic to dairy and is allergic to gluten.
5. Calculate the probability that in a room full of 6 children, NO child is allergic to nuts.
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