Homework

Due Tuesday, June 4

Problem 1

Problem 2

Due Thursday, June 6

Problem 3

Problem 4

Due Thursday, June 13

Problem 5

Problem 6

Due Tuesday, June 18

Problem 7

Due Thursday, June 20

Problem 8

Problem 9 (Click here for the data.)

Due Tuesday, June 25

Problem 10

Due Thursday, June 27

Problem 11 (Click here for hints and/or comments.)

Problem 12 (Click here for hints and/or comments.)

Due Tuesday, July 2

Problem 13

Due Tuesday, July 9

Problem 14 (Click here for hints and/or comments.)

Due Thursday, July 11

Problem 15

Problem 18 (Click here for a statement of the problem (and a hint).)

Due Tuesday, July 16

Problem 16 (Click here for hints and/or comments.)

Problem 19 (Click here for hints and/or comments.)

Problem 20 (Click here for hints and/or comments.)

Problem 24 (Click here for hints and/or comments.)

Due Tuesday, July 23 (Note: Problems due on 7/23 should be given to me right before the final exam starts at 7:30. Please put the problems in the order 17, 21, 22, 23 if you staple them all together.)

Problem 17

Problem 21 (Click here for hints and/or comments.)

Problem 22 (Click here for hints and/or comments.)

Problem 23 (Click here for hints and/or comments.)

• Round all p-values to 2 significant digits. (If you're doing an exact test, it's okay to report more than 2 digits, but most of the time we're only using an approximate test. (Recall, Student's t test is an approximate test if the underlying distribution is not exactly normal.)
• When using a test like Welch's test, or using the Satterthwaite method, for which you have to approximate the appropriate df, always round to the nearest integer and use an integer value. (Note: Some software truncates a value like 12.93 to 12 instead of rounding ot to 13 --- this summer I want everyone to round.)
• Problem 17 is the last of the 15 point problems. I'll add at least one more 10 point problem, and at least 2 more 5 point problems, and in the end I'll count your best 6 of 8 15 point problems, your best 4 of 6+ 10 point problems, and your best 4 of 6+ 5 point problems. If you're not doing so well on the quizzes, and want to reduce the pressure a bit on the final exam, I encourage you to continue to turn in HW problems even though you may have already done enough problems so that you'll get a prefect HW grade when I drop the low scores. Although at the end of the class I'll average the grades the way I said I would, and so HW will only count 50% towards your overall course average, I can take into account the fact that you may have done an exceptionally nice job on the HW when I decide where to divide the scores earning an A from those earning an A-, or those earning an A- from those earning a B+, and so on.