Class Snack - Sept 20th Cookie Recipe

Fantastic Chocolate Chip Cookies

These are my favorite cookies, they have slightly crisp outside- and a nice soft centre.

3 ¼ Cups All Purpose Flour 1 ¼ tsp Baking Soda 1 tsp cinnamon- if you are feeling adventurous (it will give the cookies a slightly nutty taste!) 2 Large Eggs 1 ¼ cup Butter ¾ cup granulated sugar 1 cup packed brown sugar 1 tsp / dash vanilla extract 2 cups chocolate

1. Beat the butter, granulated sugar, and brown sugar 2. Add the vanilla, and then the eggs one at a time 3. Gradually add the flour, and baking soda, salt, and cinnamon (if using) 4. Add the chocolate

At this point if I am running short on time I will divide the dough into cookie sized balls and throw them all into the freezer on a covered plate or Tupperware for about an hour.

If you have time, put the divided cookie dough sized balls into the fridge/freezer for any length of time- sometimes I will leave them in there for a few days. The cooling time hardens the butter so that the cookies won’t spread quite as much when they are baking giving them an even better gooey centre as well as it helps them to nicely brown up a little bit more.

Bake at 375, on an un-greased cookie sheet for 9-14 minutes. Let the cookies cool on the sheet for about five minutes and then transfer to wire wracks.

1.For repeated data, what does it mean by "weighted analysis"? Why is it necessary for us to put different weights on different obervations based on their oberseved numbers in each subject?

2. When talking about the additional advantage of analysis of covariance, the author claims that it has greated statistical power by comparing the number of patients needed. I wonder how we get these exact numbers.

3. For the public bias, one example of regression towards the mean, the reason why public bias is generated lies in different methods assessing quality of a paper? How can we solve such a common problem?