Mom and Grandma are each baking chocolate chip cookies. Each gives you two cookies. One of Mom’s cookies has 14 chips in it and the other has 11. Grandma’s cookies have 6 and 8 chips.
a. Estimate the mean number of chips in one of Mom’s cookies.
b. Estimate the mean number of chips in one of Grandma’s cookies.
c. Find the uncertainty in the estimate for Mom’s cookies.
d. Find the uncertainty in the estimate for Grandma’s cookies.
e. Estimate how many more chips there are on the average in one of Mom’s cookies than in one of Grandma’s. Find the uncertainty in this estimate.
Let 
be the mean number of chips per cookie in one of Grandma’s cookies. Let 
be the numbers of chips in two of Mom’s cookies, and let 
be the numbers of chips in two of Grandma’s cookies. Then 
. The observed values are 
.
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