Transcript Warm-up Day of Ch. 6 Practice Test

Warm-up
Day of Ch. 6 Textbook Review
1)
a.
b.
c.
Student of the day!
Block 1
Student of the day!
Block 2
Discuss the answers to the Binomial Geometric
Distributions Worksheet
10 minutes to finish Let Em’ Roll
• Check with those people in your group. 3 or 4
people at your table.
• Make sure everyone has the same answers.
• If you have questions, ask me, do not ask
other groups.
Textbook Review
pg 401 E#44 to #49 (Skip E#45) and E#54 (Skip part e.)
Please explain the full simulation for 54 a.
10 terms and formulas 2pts each for 20 pts
1) Probability Review 2) 6.1 (Day 1) 3) 6.2 4) 6.3
5 notes with warm-ups (20 pts each) = 80 pts
Formulas not on A.P. Statistics Formula sheet
Geometric Distribution
1 p
1
x   
p
p
Linear Transformation
Combining Data
Answers to Textbook Review
Or 1 – geometcdf (.1, 3) = 0.729
E49. a. 1- binomcdf (20, 0.80, 9) = 0.9994
b. 1 – binomcdf (20, 0.65, 9) = 0.9468
This is assuming the region has the same statistics reported
for the rest of the country.
c. For both girls and boys (0.8 + 0.65)/2 = 0.725
So combined 1 – binomcdf(40,0.725, 19) = 0.99928
E54. a. Assumptions: First I have to assume that all 5 athletes
are equally likely to be found in each of the cereal boxes.
Model: I am assigning each of the following digits to the 5
athletes. I am going to pretend that the athlete I want is
Athlete 1.
b. (geomcdf 0.2, 4) = 0.5904
c. Expected a # is 1/0.2 = 5. It will be on average 5
boxes on average to get the desired poster.
d. For the first of one of the two athletes it would be
1/(2/5)= 2.5 boxes + 1/.2 for the second box so it will
take 7.5 boxes.
Feedback on H.W.
6.1 D7 I gave you specific directions to solve for the
distribution how you would normally would. This means
writing out the probability distribution and finding the mean
and std. dev. The second way was describe a simulation. You
had to state how you would carry it out. Stating assumptions
and your model, and how you would carry out the
repetitions.
If you got less than a 90%, you can come in during 7th
block today or tomorrow to make corrections and I
will give you partial credit back, BUT only if you do them in
this class during 7th block.
This was a question posted
on A.P. Statistics teacher mailing list.
Warm-up
Day of Ch. 6 Practice Test
4% of people have AB blood. What the probability that
there is a Type AB donor among the first five people
checked?
I understand why you use the geometcdf(0.04,5) to
calculate the probability of finding success on or before the
5th person.
But what I don’t understand is why you can’t also use
binompdf (5,0.04,1) to find the probability of one success
in five people.
Rules for Transformations
and addition and subtraction of Data
Adding andSubtracting
 X Y  

X Y
X
 Y
X  Y
 X2  Y   X2   Y2
 X2 Y   X2  
2
Y
Binomial and Geometric Distribution Review
1) # of 6
2
1
0
Combined
1/36
10/36
25/36
a. 10/ 36 b. 35/36
3) # of H Prob.
3
1/8
2
3/8
1
3/8
0
1/8
Mean: 1.5
Standard Deviation: 0.866
#4
a. 0.3
b. 0.1029
c. 3.3 or 4 houses