Question
1 of 40
2.5
Points
A
class consists of 50
women and 82 men. If a student is
randomly
selected, what is the probability that the student is a
woman?
A.
32/132
B.
27/66
C.
50/132
D.
82/132
If
a person is randomly selected, find the probability that his or
her
birthday is not in May. Ignore leap years. There are 365 days in a
year.
Express your answer as a fraction.
A.
335/365
B.
334/365
C.
336/365
D.
30/365
Question
3 of 40
2.5
Points
A
bag contains 4 red
marbles, 3 blue marbles, and 7 green marbles.
If a marble is randomly selected
from the bag, what is the
probability that it is blue?
A.
2/11
B.
3/11
C.
5/14
D.
3/14
Question
4 of 40
2.5
Points
Of
1308 people who came
into a blood bank to give blood, 314 people
had high blood pressure. Estimate
the probability that the next
person who comes in to give blood will have high
blood pressure
(to 3 decimal places).
A.
0.250
B.
0.490
C.
0.240
D.
0.160
Question
5
of 40
2.5
Points
A
study of 600 college
students taking Statistics 101 revealed
that 54
students received the grade of A. Typically 10% of the
class gets an A.
The difference between this group of students
and the expected value is
not significant at the 0.05 level.
What does this mean in this case?
A.
The probability that the
difference occurred due to chance is
less than 0.05.
B.
The probability of getting an A
is 10% and only 9% got an A in
this
study. The difference is less than 5% so it is not
significant.
C.
There is not enough information
to make any conclusion.
D.
The
probability that the difference occurred due to chance is more than
0.05.
Question
6 of 40
2.5
Points
In
a poll, respondents
were asked whether they had ever been in a
car accident. 220 respondents
indicated that they had been in a
car accident and 370 respondents said that
they had not been in
a car accident. If one of these respondents is randomly
selected,
what is the probability of getting someone who has been in a
car
accident? Round to the nearest thousandth.
A.
0.384
B.
0.380
C.
0.373
D.
0.370
Question
7 of 40
2.5
Points
The
probability that
Luis will pass his statistics test is 0.94.
Find the probability that he will
fail his statistics test.
A.
0.02
B.
0.05
C.
0.94
D.
0.06
If
you flip a coin three
times, the possible outcomes are HHH, HHT,
HTH, HTT, THH, THT, TTH, TTT. What
is the probability of getting
at least two tails?
A.
1/2
B.
2/3
C.
3/4
D.
4/9
Question
9 of 40
2.5
Points
Suppose
you buy 1 ticket
for $1 out of a lottery of 1000 tickets where
the prize for the one winning
ticket is to be $500. What is your
expected value?
A.
$0.00
B.
−$0.40
C.
−$1.00
D.
−$0.50
.ashworthcollege.edu/portal/tool/2758e19f-96bc-436f-9dc5-013b7b195d05/jsf/delivery/deliverAssessment”>Reset
Selection
Question
10 of 40
2.5
Points
If
you flip a coin three
times, the possible outcomes are HHH, HHT,
HTH, HTT, THH, THT, TTH, TTT. What
is the probability that at
least two heads occur consecutively?
A.
1/8
B.
3/8
C.
5/8
D.
6/8
uestion
11 of 40
2.5
Points
Suppose
you have an
extremely unfair die: The probability of a 6 is 3/8,
and the probability of
each other number is 1/8. If you toss the
die 32 times, how many twos do you
expect to see?
A.
2
B.
4
C.
3
D.
5
Question
12 of 40
2.5
Points
Suppose
you have an
extremely unfair coin: the probability of a head is
1/5, and the probability of
a tail is 4/5. If you toss the coin
40 times, how many heads do you expect to
see?
A.
8
B.
6
C.
5
D.
4
Question
13
of 40
2.5
Points
The
data set represents
the income levels of the members of a
country club. Estimate the probability
that a randomly selected
member earns at least $98,000.
112,000 126,000 90,000
133,000
94,000 112,000 98,000 82,000 147,000 182,000 86,000 105,000
140,000
94,000 126,000
119,000 98,000 154,000 78,000 119,000
A.
0.4
B.
0.6
C.
0.66
D.
0.7
Question
14 of 40
2.5
Points
Sammy
and Sally each
carry a bag containing a banana, a chocolate bar,
and a licorice stick.
Simultaneously, they take out a single
food item and consume it. The possible
pairs of food items that
Sally and Sammy consumed are as follows.
chocolate bar
–
chocolate bar
licorice stick –
chocolate
bar
banana – banana
chocolate bar –
licorice
stick
licorice stick –
licorice
stick
chocolate bar – banana
banana – licorice
stick
licorice stick – banana
banana – chocolate
bar
Find the probability
that no chocolate bar was eaten.
A.
4/9
B.
5/9
C.
7/9
D.
5/8
Question
15 of 40
2.5
Points
On
a multiple choice test,
each question has 6 possible answers. If
you make a random guess on the first
question, what is the
probability that you are correct?
A.
1/5
B.
1/6
C.
1/4
D.
2/5
Question
16 of 40
2.5
Points
Based
on meteorological
records, the probability that it will snow in
a certain town on January 1st is
0.413. Find the probability
that in a given year it will not snow on January
1st in that
town.
A.
0.345
B.
0.425
C.
0.587
D.
0.592
Question
17
of 40
2.5
Points
A
28-year-old man pays
$125 for a one-year life insurance policy
with coverage of $140,000. If the
probability that he will live
through the year is 0.9994, to the nearest
dollar, what is the
manâ€
s expected value for the insurance policy?
A.
$139,916
B.
−$41
C.
$84
D.
−$124
Question
18 of 40
2.5
Points
If
you flip a coin three
times, the possible outcomes are HHH, HHT,
HTH,
HTT, THH, THT, TTH, TTT. What is the probability of getting
at least one head?
A.
4/9
B.
5/6
C.
7/8
D.
5/8
Question
19 of 40
2.5
Points
A
sample space consists
of 46 separate events that are equally
likely. What is the probability of each?
A.
1/24
B.
1/46
C.
1/32
D.
1/18
Question
20 of 40
2.5
Points
Suppose
you have an
extremely unfair coin: the probability of a head is
1/3 and the probability of
a tail is 2/3. If you toss the coin
72 times, how many heads do you expect to
see?
A.
12
B.
22
C.
24
D.
26
Question
21 of 40
2.5
Points
Eleven
female college
students are selected at random and asked their
heights. The heights (in
inches) are as follows:
67, 59,
64, 69, 65, 65,
66, 64, 62, 64, 62
Estimate the mean
height
of all female students at this college. Round your answer
to the nearest tenth
of an inch if necessary.
A.
It is not possible to estimate
the population mean from this
sample data
B.
64.3 inches
C.
64.9 inches
D.
63.7 inches
Question
22
of 40
2.5
Points
Monthly
incomes of
employees at a particular company have a mean of
$5954. The distribution of
sample means for samples of size 70
is normal with a mean of $5954 and a
standard deviation of $259.
Suppose you take a sample of size 70 employees from
the company
and find that their mean monthly income is $5747. How many
standard
deviations is the sample mean from the mean of the
sampling distribution?
A.
0.8 standard deviations above
the mean
B.
0.8 standard deviations below
the mean
C.
7.3 standard deviations below
the mean
D.
207 standard deviations below
the mean
Question
23 of 40
2.5
Points
Which
graph has two
groups of data, correlations within each group,
but no correlation among all
the data?
A.
.jpg”
alt=”https://study.ashworthcollege.edu/access/content/group/8ef8b2f7-197d-41de-a4c4-db81a717c013/v9/Images/Lesson%206%20Exam/MA260%20Lesson%206%20exam%20question%203%20_A_.JPG”>
B.
.jpg”
alt=”https://study.ashworthcollege.edu/access/content/group/8ef8b2f7-197d-41de-a4c4-db81a717c013/v9/Images/Lesson%206%20Exam/MA260%20Lesson%206%20exam%20question%203%20_B_.JPG”>
C.
.jpg”
alt=”https://study.ashworthcollege.edu/access/content/group/8ef8b2f7-197d-41de-a4c4-db81a717c013/v9/Images/Lesson%206%20Exam/MA260%20Lesson%206%20exam%20question%203%20_C_.JPG”>
D.
.jpg”
alt=”https://study.ashworthcollege.edu/access/content/group/8ef8b2f7-197d-41de-a4c4-db81a717c013/v9/Images/Lesson%206%20Exam/MA260%20Lesson%206%20exam%20question%203%20_D_.JPG”>
Question
24
of 40
2.5
Points
The
scatter plot and
best-fit line show the relation between the
price per item (y) and the
availability of that item (x) in
arbitrary units. The correlation coefficient
is -0.95. Determine
the amount of variation in pricing explained by the
variation in
availability.
.jpg”
alt=”https://study.ashworthcollege.edu/access/content/group/8ef8b2f7-197d-41de-a4c4-db81a717c013/v9/Images/Lesson%206%20Exam/MA260%20Lesson%206%20exam%20question%2012.JPG”>
A.
5%
B.
10%
C.
95%
D.
90%
Question
26 of 40
2.5
Points
Which
line of the three
shown in the scatter diagram below fits the
data best?
.jpg”
alt=”https://study.ashworthcollege.edu/access/content/group/8ef8b2f7-197d-41de-a4c4-db81a717c013/v9/Images/Lesson%206%20Exam/MA260%20Lesson%206%20exam%20question%2015.JPG”>
A.
A
B.
B
C.
C
D.
All
the lines are equally good
Question
27 of 40
2.5
Points
In
a poll of 400 voters
in a certain state, 61% said that they
opposed a voter ID bill that might
hinder some legitimate voters
from voting. The margin of error in the poll was
reported as 4
percentage points (with a 95% degree of confidence). Which
statement
is correct?
A.
The reported margin of error is
consistent with the sample size.
B.
There is not enough information
to determine whether the margin
of error is consistent with the sample size.
C.
The sample size is too small to
achieve the stated margin of
error.
D.
For the given sample size, the
margin of error should be smaller
than stated.
Question
28
of 40
2.5
Points
Which
point below
would be an outlier if it were on the following
graph?
.jpg”
alt=”https://study.ashworthcollege.edu/access/content/group/8ef8b2f7-197d-41de-a4c4-db81a717c013/v9/Images/Lesson%206%20Exam/MA260%20Lesson%206%20exam%20question%202.JPG”>
A.
(25,
20)
B.
(5,
12)
C.
(7,
5)
D.
(5,
3)
Question
29 of 40
2.5
Points
Select
the best fit line
on the scatter diagram below.
.jpg”
alt=”https://study.ashworthcollege.edu/access/content/group/8ef8b2f7-197d-41de-a4c4-db81a717c013/v9/Images/Lesson%206%20Exam/MA260%20Lesson%206%20exam%20question%205.JPG”>
A.
A
B.
B
C.
C
D.
None
of the lines is the line of best fit
Question
30
of 40
2.5
Points
The
graph shows a
measure of fitness (y) and miles walked weekly.
Identify the probable cause
of the correlation.
.jpg”
alt=”https://study.ashworthcollege.edu/access/content/group/8ef8b2f7-197d-41de-a4c4-db81a717c013/v9/Images/Lesson%206%20Exam/MA260%20Lesson%206%20exam%20question%204.JPG”>
A.
The
correlation is coincidental.
B.
There
is a common underlying cause of the correlation.
C.
There
is no correlation between the variables.
D.
Walking
is a direct cause of the fitness
Question
31 of 40
2.5
Points
A
researcher wishes to
estimate the proportion of college students
who cheat on exams. A poll of 490
college students showed that
33% of them had, or intended to, cheat on
examinations. Find the
margin of error for the 95% confidence interval.
A.
0.0432
B.
0.0434
C.
0.0425
D.
0.0427
Question
32
of 40
2.5
Points
Select
the best estimate
of the correlation coefficient for the data
depicted in the scatter diagram.
.jpg”
alt=”https://study.ashworthcollege.edu/access/content/group/8ef8b2f7-197d-41de-a4c4-db81a717c013/v9/Images/Lesson%206%20Exam/MA260%20Lesson%206%20exam%20question%2014.JPG”>
A.
0.60
B.
-0.97
C.
0.10
D.
-0.60
Question
33 of 40
2.5
Points
A
sample of 64
statistics students at a small college had a mean
mathematics ACT score of 28
with a standard deviation of 4.
Estimate the mean mathematics ACT score for all
statistics
students at this college. Give the 95% confidence interval.
A.
28.0 to 30.0
B.
25.0 to 27.0
C.
29.0 to 31.0
D.
27.0 to 29.0
Question
34 of 40
2.5
Points
Of
the 6796 students in
one school district, 1537 cannot read up to
grade level. Among a sample of 812
of the students from this
school district, 211 cannot read up to grade level.
Find the
sample proportion of students who cannot read up to grade level.
A.
0.14
B.
0.26
C.
211
D.
0.23
Question
35
of 40
2.5
Points
30%
of the fifth grade
students in a large school district read
below grade level. The distribution
of sample proportions of
samples of 100 students from this population is
normal with a
mean of 0.30 and a standard deviation of 0.045. Suppose that
you
select a sample of 100 fifth grade students from this district and
find
that the proportion that reads below grade level in the
sample is 0.36. What
is the probability that a second sample
would be selected with a proportion
less than 0.36?
A.
0.8932
B.
0.8920
C.
0.9032
D.
0.9048
Question
36
of 40
2.5
Points
Select
the best
estimate of the correlation coefficient for the data
depicted in the scatter
diagram.
.jpg”
alt=”https://study.ashworthcollege.edu/access/content/group/8ef8b2f7-197d-41de-a4c4-db81a717c
The post A class consists of 50 appeared first on My Assignment Online.