| Hand in (All D&V)
Ch. 19p. 386 (including parts done ahead) 5, 6 Conclusions. Do these with the "Don't misstate..." section, pp. 361-2. 9 Cars A. Use the Normal table to find z* for a 99% CI (This is the z* for which 99% of the area is between -z* and +z*). Find z* for a 90% CI. (Text p.358 shows that z* = 1.645 to 3 decimal places. Normal table only gives 2 places.) Check your results by comparing with the corresponding results in Table T p. A-53. 11 Ghosts (Do rest.) 13 Teenage drivers (Do if you didn't) 21 Rickets 3, 4 Conditions 16 Local news Hand in all (and only) the ABOVE problems. For the Ch. 19 problems below, do the parts you can and leave space for calculating n. Save to hand in as part of Day 32. ME, C, n pp. 356-7, 361-3. Problems p. 368 7, 8 Relationships 23 Deer ticks 25 Graduation The answers in the back use the 25% as the p to plug in. Redo part a (only) using 50% as the p (what you would do if you had no idea what p would be.). How many subjects do you "save" by using the 25%? 26 Hiring 28 Hiring again 29 Pilot study = = = = = = = = = =
|
Read,
to discuss |
Optional |
Do-overs for Exam
2 are due next class!
You found the 68% and 95% CI's for your
sample., Please add your results to our list: (with your
initials)
# of 1's, p-hat, SE(p-hat), p-hat +
SE, ME for 95% = 1.96SE, p-hat + 1.96SE
Also draw your 68% CI on the graph
circulating |------o------|
Homework questions?
Definition
and computation of CI: introduce
table T, and Assumptions/conditions. Chapter 19
Day
30
Start here Wed:
Sample size for desired ME and C; Why this
ME "works". Day 30
Level C confidence interval estimate
of
population proportion p:
"One -proportion z-interval"
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