## 1. The distribution of weights of United States pennies is
## approximately normal with a mean of 2.5 grams and a standard
## deviation of 0.03 grams.
## a. What is the probability that a randomly chosen penny weighs less
## than 2.4 grams?
## b. What is the probability that a randomly sampled penny is greater
## than 2.4 grams?
## c. What is the probability that a randomly sampled penny is between 1.2 and 3.2 grams?
## d. What weight marks the smallest 10% of pennies?
## e. What weight marks the largest 12% of pennies?
## 2. Practice the likelihood, both by hand and in R, for the binomial
## distribution. Hint: ?rbinom
## f(x | p) = K! / (k! (K - k)!) * p^x * (1-p)^(1-x)
## 3. Two books are assigned for a statistics class: a textbook and
## its corresponding study guide. The university bookstore determined
## 20% of enrolled students do not buy either book, 55% buy the
## textbook only, and 25% buy both books, and these percentages are
## relatively constant from one term to another. If there are 100
## students enrolled, how many books should the bookstore expect to
## sell to this class?
## 4. Would you be surprised if the bookstore sold slightly more or
## less than 105 books?
## 5. The textbook costs $137 and the study guide $33. How much rev-
## enue should the bookstore expect from this class of 100 students?
## 6. Pick a data set of your choice and practice making, reading, and
## interpretting our four basic plots: bar, histogram, box plot, and
## scatter.
## 7. Using the data set groceries, from my website, select two items
## and make a table. Hint: ?dplyr::select; ?table. Calculate lift
## for one of the association rules implied by your table.