Analyzing Experiments: A Template
Research question
Subjects/experimental units
Explanatory variable(s) / (Factor(s)
Quantitative/categorical?
Treatment(s)
(Factor levels)
Response variable(s)
Quantitative/categorical?
Describe the experimental design
in
Practice Test 4B
AP Statistics
Name:
Directions: Do all of your work on these sheets.
Part 1: Multiple Choice. Circle the letter corresponding to the best answer.
1.
Which of the following scatterplots would indicate that Y is growing exponentially over t
Francis Howell School District
Mission Statement
Francis Howell School District is a learning community where all students reach their full potential.
Vision Statement
Francis Howell School District is an educational leader that builds excellence through
Mr. Sullivan
Name _
AP World History
Date _
Textbook Guided Reading POD 21 Nationalism, Tribalism & Genocide in Africa
Period _
Directions: Please complete these questions as a means to BEGIN studying and
preparing for the upcoming POD test. It is your re
1. Which of the following will most
likely occur in an economy if
more money is demanded than
is supplied?
a. The amount of investment
spending will increase.
b. Interest rates will decrease.
c. Interest rates will increase.
d. The demand curve for money
Quiz Details
Question Answer Choices Correct Answer Answer Explanation Point Value
Borrow 10%-30% of the credit limit on
a credit card and make the minimum Borrow 10%- Borrow 10%-30%
1. Select the
payment on time every month, Use a 30% of the
of the credi
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Humerus length (cm)
14.1 (a) See also the solution to Exercise 3.19. The correlation is r 0.994, and linear regression
3.660 1.1969x . The scatterplot below shows a strong, positive, linear relationgives y
ship
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13.1 (a) (i) 0.20
(ii) P 0.3172.
P
0.25. (ii) P
0.235. (b) (i) 0.02
P
0.025. (ii) P
0.0204. (c) (i) P
0.25.
13.2 H0: The marital-status distribution of 25- to 29-year-old U.S. males is the same as that of the
p
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12.1 (a) Population: the 175 residents of Tonyas dorm; p is the proportion who like the food.
(b) p 0.28.
12.2 (a) The population is the 2400 students at Glens college, and p is the proportion who believe
tuiti
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10
10.1 (a) 44% to 50%. (b) We do not have information about the whole population; we only know about a small sample. We expect our sample to give us a good estimate of the population value, but it will not be exa
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9
9.1
2.5003 is a parameter; x
9.2 p
7.2% is a statistic.
9.3 p
48% is a statistic; p
9.4 Both x1
335 and x2
2.5009 is a statistic.
52% is a parameter.
289 are statistics.
9.5 (a) Since the proportion of times the
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8.1 (a) No: There is no fixed n (i.e., there is no definite upper limit on the number of defects). (b) Yes: It is reasonable to believe that all responses are independent (ignoring any "peer pressure"), and all
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7.1 (a) P(less than 3) P(1 or 2)
2 6 1 3.
(b)(c) Answers vary.
7.2 (a) BBB, BBG, BGB, GBB, GGB, GBG, BGG, GGG. Each has probability 1/8. (b) Three of the eight arrangements have two (and only two) girls, so P(X
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6
6.1 Long trials of this experiment often approach 40% heads. One theory attributes this surprising result to a "bottle-cap effect" due to an unequal rim on the penny. We don't know. But a teaching assistan
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5.1 The population is employed adult women, the sample is the 48 club members who returned
the survey.
5.2 (a) An individual is a person; the population is all adult U.S. residents. (b) An individual is a
househo
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4.1 (a) Since 2.54 cm 1 inch, inches are changed to centimeters by multiplying by 2.54. Letting
x
height in inches and y
height in centimeters, the transformation is y
2.54x, which is
1
monotonic increasing.
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3
3.1 (a) Time spent studying is explanatory; the grade is the response variable. (b) Explore the relationship; there is no reason to view one or the other as explanatory. (c) Rainfall is explanatory; crop
yiel
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2
2.1 There are many correct drawings. Here are two possibilities:
(a)
(b)
2.2 (a) The area under the curve is a rectangle with height 1 and width 1. Thus the total area under
the curve 1 1 1.
(b) 20%. (The reg
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1
1.1 (a) The individuals are vehicles (or cars). (b) The variables are: vehicle type (categorical),
transmission type (categorical), number of cylinders (quantitative), city MPG (quantitative), and
highway MPG