Transcript jeapordy - Fort Bend ISD

Describing
Data Ch1-3
Box-Plots
Normal
Ch4-5
Linear Reg
Ch6-9
Experiment
Ch10-12
Probability
Ch13-14
RV,
Bino/Geom
Ch15-17
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If we want to discuss any gaps and clusters in
a data set, which of the following should not
be chosen to display the data set?
A)Histogram
B) stem-and-leaf plot
C) dotplot
D) boxplot
E) any of these would work
A 100
D) boxplot
A 100
What is the IQR?
A 200
1
A 200
Which of the following statements are
true?
I. The range of the sample data set is
never greater than the range of the
population.
II. The interquartile range is half the
distance between the first quartile and the
third quartile.
III. While the range is affected by outliers,
the interquartile range is not
A 300
I,III
A 300
To which of the below boxplot
does the following histogram
correspond?
A 400
B
A 400
A company held a blood pressure screening clinic for
its employees. The results are summarized in the
table below by age group and blood pressure level.
AGE
Blood Pressure
Under 30 30 – 49 Over 50
Low
27
48
23
Normal 38
90
59
High
31
92
72
Find the marginal distribution of blood pressure
level.
A 500
Low 20%
Normal 39%
High 41%
A 500
Standard deviation measures:
A) The variability of the data about the mean
B) The distance between the smallest and
largest measurements.
C) Where the data tend to cluster or center.
D) The total amount of deviation in the data.
E) The maximum distance of one
measurement or observation from the next.
B 100
Standard deviation measures:
A) The variability of the data about the mean
Standard
deviation
measures:
B) The distance
between
the smallest and
A)
The measurements.
variability of the data about the mean
largest
C) Where the data tend to cluster or center.
D) The total amount of deviation in the data.
E) The maximum distance of one
measurement or observation from the next.
B 100
A data set’s five-number summary is given
below:
Min =22 Q1= 31.2 Med= 44.5 Q3= 59.8 Max= 67
Given there are no outliers in this data set,
which of the following conclusions can be
drawn from this data set?
I. Approximately 25% of the scores are above
59.8
II. Approximately 50% of the scores lie
between 31.2 and 59.8.
III. The mean is less than 44.5
B 200
I, II
B 200
The mean weight of babies born in Central
hospital last year was 6.3 pounds. Suppose the
standard deviation of the weights is 2.1
pounds. Which would be more unusual, a
baby weighing 4 pounds or a baby weighing
8.5 pounds? Explain.
B 300
A 4 pound baby is more unusual (z = -1.10)
compared with an 8.5 pound baby (z = 1.05).
B 300
After increased patrol, cars on an old town
highway travel at speeds averaging 53 mph.
If 10% of vehicles travel above 70 mph, what
approximate standard deviation could
represent this model (assuming a Normal
model is appropriate)?
B 400
13.27 mph
B 400
If 75% of all families spend more than
$75 weekly on food, while 15% spend
more than $150, what is the mean
weekly expenditure and what is the
standard deviation?
B 500
m = $104.39, s = $43.86
B 500
Describe the strength and
direction of the relationship
with a correlation coefficient
equal to 0.49.
C 100
Weak and positive
C 100
A response variable appears to be
exponentially related to the explanatory
variable. The natural logarithm of each y-value
is taken and the least squares regression line is
found to be ln yˆ  1.64  .88 x .
What is the predicted value when x = 3.1?
C 200
0.34
C 200
Which of the following statements about influential
points is true?
I. Removing an influential point from a data set can
have a major effect on the regression equation.
II. If you calculate the residual between the
influential point and a regression line based on the
rest of the data, it will always be large.
III. You will typically find an influential point
horizontally distant from the rest of the data along
the x-axis.
C 300
I, III
C 300
Consider data set A: (2,8), (3,6), (4,9), and
(5,9). Find and Interpret the coefficient of
determination.
C 400
About 30% of the variation in y
can be explained by the linear
model (LRSL) of y on x
C 400
The relationship between the price of
yachts (y) and their length (x) is analyzed.
The mean length was 47 feet with a
standard deviation of 10. The mean price
was $87,000 with a standard deviation of
14,000. The correlation between the price
and the length was 0.39. What is the
regression line?
C 500
= 61,338 + 546 length
C 500
The primary purpose of randomization is
to reduce:
(a) variation
(b) blinding
(c) bias
(d) replication
(e) None of the these
D 100
(c) bias
D 100
A nationally known cosmetics company to test
new formulations of moisturizer hires a market
research firm. Using their extensive list of
possible subjects, the market researchers first
divide the subjects into 5 age groups and then
randomly select names from each age group to
participate in a study. This is an example of :
a) systematic sampling
b) a simple random sample.
c) stratified sampling
d) cluster sampling
e) convenience sampling
D 200
c) stratified sampling
D 200
A basketball player has a 70% free throw percentage.
Which plan could be used to simulate the number of free
throws she will make in her next five free throw
attempts?
I. Let 0,1 represent making the first shot, 2, 3 represent
making the second shot, ..., 8, 9 represent making the fifth
shot. Generate five random numbers 0-9, ignoring
repeats.
II. Let 0, 1, 2 represent missing a shot and 3, 4, 5, 6, 7,8
and 9 represent making a shot. Generate five random
numbers 0-9 and count how many numbers are in 3-9.
III. Let 0, 1, 2 represent missing a shot and 3, 4,..., 9
represent making a shot. Generate five random numbers
0-9 and count how many numbers are in 3-9, ignoring
D 300
repeats.
II
D 300
Which of the following are true
statements?
I. In general, strong association implies
causation.
II. In well-designed, well-conducted
experiments, strong association implies
causation.
III. Causation and association are
unrelated concepts.
D 400
II
D 400
In a 1992 London study, 12 out of 20 migraine sufferers
were given chocolate whose flavor was masked by
peppermint, while the remaining eight sufferers received a
similar-looking, similar-tasting tablet that had no chocolate.
Within 1 day, five of those receiving chocolate complained
of migraines, while no complaints were made by any of
those who did not receive chocolate. Which of the following
is a true statement?
A) This study was an observational study of 20 migraine
sufferers in which it was noted how many came down with
migraines after eating chocolates.
B) A study was performed using chocolate as a placebo to
study one cause of migraines.
C) An experiment was performed comparing a treatment
group that was given chocolate to a control group that was
D 500
not.
C
D 500
If P(A) = 0.24 and P(B) = 0.52 and events A
and B are independent, what is P(A or B)?
E 100
0.6352
E 100
Given events A and B where P(A) = 0.25 ,
P(B) = 0.30. If P( A|B) = 0.40, what is the
value of P(B|A)?
E 200
0.48
E 200
Suppose that among all U.S. adults, 60%
are married and 55% have college
degrees. And 20% are neither married nor
have a college degree. If you select an
adult at random, what is the probability
that the adult has a college degree but
he/she is not married?
E 300
0.2
E 300
Ricky has a flight to catch on Monday
morning. His father will give him a ride to
the airport. If it rains, the traffic will be bad
and the probability that he will miss his
flight is 0.05. If it doesn't rain, the
probability that he will miss his flight is
0.01. The probability that it will rain on
Monday is 0.18.
Suppose that Ricky misses his flight. What
is the probability that it was raining?
E 400
0.523
E 400
Some employers use lie detector tests to
screen job applicants. Lie detector tests are
not completely reliable. Suppose that a
polygraph can correctly detect 65% of lies,
but incorrectly identifies 16% of true
statements as lies.
Suppose that 90% of the job applicants tell
the truth during the polygraph test. What is
the probability that a person who fails the
test was actually telling the truth?
E 500
0.689
E 500
A basketball player has made 66% of his
foul shots during the season. Assuming the
shots are independent, find the probability
that in tonight's game he misses for the first
time on his 6th attempt?
F 100
0.0426
F 100
The amount of time that an individual
must wait for the elevator by the
bookroom is represented by a uniform
distribution with mean of 15 seconds, a
standard deviation of 3.9 seconds, and a
range of 20 seconds. What is the
probability that a random wait time is
more than 10 seconds?
F 200
0.75
F 200
A test consists of 10 true/false questions.
If a student guesses on each question,
what is the probability that the student
will answer at least 9 questions correctly?
F 300
0.0107
F 300
A company sells light bulbs in packages
of 20 and estimates that the mean number
of defective light bulbs in a package is
0.5 with a standard deviation of 0.7. If a
customer buys 12 packages, what are the
expected value and standard deviation of
the number of defective light bulbs?
Assume that packages are independent of
each other.
F 400
mean = 6 st. dev. = 2.42
F 400
For an upcoming concert, each customer may
purchase up to 3 child tickets and 3 adult tickets.
The mean and the standard deviation for the
number of adult tickets purchased by a single
customer are 2 and 1.2, respectively, and the mean
and the standard deviation for the number of child
tickets purchased by a single customer are 1 and
1.3, respectively. Suppose each child ticket costs
$15 and each adult ticket costs $25. Compute the
standard deviation of the total amount spent per
purchase.
F 500
$35.78
F 500
The Final Jeopardy Category is:
Probability
Please record your wager.
Click on screen to begin
P( winning in game A) = 0.5, P( losing in
game B) = 0.2, and the P( losing in at least
one game) = 0.65, what is the P( winning in
at least one game)?
Click on screen to continue
0.95