Thursday HW

Tonight, please complete the following in your textbook (it's a little longer than I usually give--that's because it was a 2 day hw!)

• Page 39: 19
• Some probability review here--use your notes from day 3 of our summer academy!
• Remember to look at the "of ____" to determine your denominator...
• For example, if we were asked what percent of waitlisted students are black/hispanic, then we know our denominator is 300, or the total number waitlisted ("of waitlisted")
• Check your answers in the back of the book!
• Pages 65-71: 9, 11, 17, 19a, 33c
• 9a--check your answer in the back of the book
• For 9b don't worry about the answer in the back of the book or describing shape...we'll learn that...
• For this question (9b), I want you to write a few sentences...
• Write a sentence providing the median size (in acres) of the 36 vineyards and the range in sizes of vineyards
• Then, write a sentence describing what this graph tells us about the sizes of these 36 vineyards--what sizes are most vineyards? "Most vineyards are _________. 
• Comment on any "unusual features--were any vineyards unusually large or small? What size?
• For 11a (create a stemplot) round everything to 2 decimal places and use split stems (like today's example in class)--check your answer in back!
• For 11b just describe the center and spread--use your calculator to find the 1 var stats
• Center: provide the mean and median
• Write these in a complete sentence: "The mean gas price for 16 gas stations in Ithaca, NY is ___ and the median price is ___."
• Spread: provide range, IQR, and standard deviation (Sx)
• Write these in a complete sentence: "The range of gas prices for 16 gas stations in Ithaca, NY is ____, with an IQR of ___, and a standard deviation of _____."
• Take a look at the answer in the back of the book for 11b!
• For 11c look at your stemplot--what unusual feature do you notice? (Unusual = gaps)
• For 17 only create the stemplot, check your graph in back
• For 19a check your dotplot with the back of the book
• For 33c you want to determine if there are any outliers for the # of assaults (per 1000) and then for the # killed-injured (per 1000)...
• This is two different problems--first use your calculator and the 1 Var Stats to find Q1 and Q3 for the # assaults, then calculate the fences to see if there are outliers
• Repeat this process for the # killed-injured
• Check your answer in back!

Tomorrow in class we'll start our notes on "describing distributions!" This will carry us into next week, and then we'll finally have some opportunities to get some groupwork/practice going in class (and take a break from listening to me)!