AP Statistics
November 14-18, 2011
Monday, November 14, 2011
AP Statistics A
1. Conversion problem. Mr. Jacobs can correct 150
quizzes in 50 minutes. His student aide can correct
150 quizzes in 75 minutes. Working together, how
many minutes will it take them to correct 150
quizzes?
2. Graphing lines. Sketch and label the following lines:
a.
b.
c.
d.
e.
f(x)=3x-2
g(x)=(-2/3)x+4
h(x)=-4x-3
i(x)=3x
j(x)=(4/5)x+1
3. Homework: HW #24, Ch 8: probs 2, 3, 6, due Tu,
11/15/2011
Tuesday, November 15, 2011
AP Statistics A warm-up
1. Satan contacts you with an unusual proposition: he
wants you to find the middle 66.6% of a normallydistributed population, “for sentimental reasons,” he
claims. Using the normal model N(0,1), what are the
z-values for that mark?
2. What is the equivalent of the z-values if the
population has a mean of 125 and a standard
deviation of 15?
3. What is the cut-off value for the population of
question 2 if Satan wants only the upper 66.6% of the
normally-distributed population? (Use only the N(0,1)
model.
4. Homework: HW #25, Ch 8: probs 8, 9, 11, 14, due
W, 11/16/2011
Wednesday, November 16, 2011
AP Statistics A warm-up
1. In your calculator, enter the following data into
L1: {6 10 14 19 21}
2. In L2, enter the following data: {5 3 7 8 12}
3. Run 1-var on each list and write down the means
and standard deviations.
4. Graph the data as a scatterplot. We will later use
the information to calculate the correlation
coefficient by hand.
5. Homework: correct the past two homework
assignments (or do them) reflecting the lectures
in today’s class. Due tomorrow, Th, 11/17/2011.
Thursday, November 17, 2011
AP Statistics A warm-up
1. Conversion: On November 8, asteroid YU55a came within 200,000 miles of the earth.
How many earth diameters is that, if the
earth’s diameter is 8,000 miles?
2. Enter the data from problem 5 in Chapter 8
into lists and calculate the regression line.
Does it agree with the line given in the
book?
3. HW #26, Ch 8: probs 17, 20, 24, 27, due F,
11/18/2011
Friday, November 18, 2011
AP Statistics A warm-up
1. Write a paragraph describing the
difference between association and
correlation.
2. Do the TI Tips on pp. 183-84 of the
textbook and create the residuals plot
described on p. 184.
3. Homework: HW #27, Ch 8: probs 31, 35,
38, 41, due M, 11/21/2011
• Homework: HW #28, Ch 8: probs 44, 47,
50, due Tu, 11/22/2011