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AP Statistics Fall Final Overview
A simulation
For independent events, P(A and B) is
AP Statistics Fall Final Overview
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Practice for Fall Final
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Questions
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Answers
1
For independent events, P(A and B) is
P(A) + P(B)
P(A) + P(B) - P(A and B)
P(A)*P(B)
1 - P(A or B)
2
A simulation
all of the above
gives an experiential probability
imitates random behavior
is used when direct calculation is difficult or impossible
3
Which would NOT be used to choose individuals randomly?
select from names in a hat
randNorm
randint
table of random integers
4
u
=170mg/dl and std. dev. of 30 mg/dl. 95% of the values fall between . . .
140 and 230
110 and 230
110 and 200
140 and 200
5
Which of the following is not an example of data transformation?
a linear model
a cubic model
a power law model
an exponential growth model
6
A five number summary is used to create
a histogram
a normal probability plot
a box plot
none of the above
7
If
u
=50 and std.dev.=2.3, find P(25<X<30)
0
.977
none of the above
.015
8
The 1.5 IQR rule is a way to find
outliers
whether or not we should use a normal distribution
the spread of the data
whether or not the data follows a density curve
9
Men's heights have
u
=70" and std.dev.=3". Find the probability that a man is less than 5'8".
none of the above
.252
.748
3.167 X 10-2
10
Men's heights have
u
=70" and std.dev.=3". Find the z-score of a woman whose height is 5'7".
18.667
-1
-4.333
none of the above
11
Which of the following apply to normal distributions?
Neither
Both
The 68-95-99.7 Rule
Chebyshev's Rule
12
A curve that is always on or above the horizontal axis and with an area of exactly 1 is called
a density curve
an ogive
a probability curve
a normal curve
13
A least-squares regression line
all of the above
has slope b=r(sy / sx)
passes through (ux, u y)
uses the equation y=a+bx
14
Men's heights have
u
=70" and std.dev.=3". Find P(64<height<76) exactly.
.0455
none of the above
95%
.954
15
When describing data, we should include
graphs
who, what, when, where and why data was collected
all of the above
numerical summaries
16
An ogive is
a time plot
a dot plot
a relative cumulative frequency plot
a histogram
17
IQ is an example of
a categorical variable
a quantitative variable
a leveled variable
all of the above
18
What is the probability of choosing 2 Jacks from a standard deck of cards without replacement?
0.0045
all of the above
3/663
(3/51)÷13
19
u
=0 and standard deviation = 1. This is called . . .
The standardized normal distribution
The distribution of z scores
All of the above
The normalcdf distribution
20
A normal probability plot indicates a normal distribution when
the points look like a normal curve
the points have an s shape
the points are evenly scattered from left to right
the points lie close to a straight line
21
Men's heights have
u
=70" and std.dev.=3". Find the z-score of a man whose height is 6'2".
66.7
-.667
.667
none of the above
22
If a distribution is skewed, which is the best summary to describe the data set?
5 number summary
none of the above
1.5 IQR
mean and standard deviation
23
Causation can only be determined
by long term observation
after thorough data analysis
when all lurking variables are eliminated
through a well designed experiment
24
An association in bivariate data can be described by
direction
strength
form
all of the above
25
Men's heights have
u
=70" and std.dev.=3". Find P(64<height<76) using the 68-95-99.5% rule.
.0455
95%
none of the above
.954
26
μ=80; std. dev = 20. What percent of the data fall between 60 and 140?
68%
82.5%
95%
93.5%
27
The best way to determine how people are feeling in the country right now would be:
an observational study that is not a survey.
none of the above.
a survey
an experiment
28
In order to determine how well a line fits data, we should consider
all of the above
the residual plot
r
r2
29
Chebyshev's Inequality applies to
normal distributions
all of the above
skewed distributions
multi-modal distributions
30
The values that a variable takes on and how often it takes those values is called a
none of the above
distribution
sample
population
31
r
2
=(SST-SSE)/SST
describes the percentage of the output predicted by a model
is called the coefficient of determination
all of the above
32
What do we call a measure of center?
median
mean
mode
all of the above
33
In statistics, we describe individuals in a data set using
all of the above
variables
standard deviations
means
34
Which is a measure of spread?
max minus mean
all of the above
standard deviation
inner quartile range
35
Given: 5 red marbles, 3 green and 2 blue, find of P(red then green) without replacement.
none of the above
(5/10)(3/9)
(5/10)(2/10)
(5/10)(2/9)
