Question 1 of 40 2.5 Points A class consists of 50 women and 82 men. If a student is randomly select

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 man’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-db81a717c013/v9/Images/Lesson%206%20Exam/MA260%20Lesson%206%20exam%20question%208.JPG”>

A.
-0.9

B. 0.1

C. 0.5

D. 0.9

Question 37 of 40

2.5 Points

Write possible
coordinates for the single outlier such that it would no longer be an outlier.
.jpg” alt=”https://study.ashworthcollege.edu/access/content/group/8ef8b2f7-197d-41de-a4c4-db81a717c013/v9/Images/Lesson%206%20Exam/MA260%20Lesson%206%20exam%20question%209.JPG”>

A. (23, 18)

B. (20, 5)

C. (15, 15)

D. (12, 15)

Question 38 of 40

2.5 Points

A researcher wishes to
estimate the proportion of college students who cheat on exams. A poll of 560
college students showed that 27% of them had, or intended to, cheat on
examinations. Find the 95% confidence interval.

A. 0.2323 to 0.3075

B. 0.2325 to 0.3075

C. 0.2325 to 0.3185

D. 0.2323 to 0.3185

Question
39 of 40

2.5 Points

The scatter plot and
best-fit line show the relation among the data for the price of a stock (y) and
employment (x) in arbitrary units. The correlation coefficient is 0.8. Predict
the stock price for an employment value of 6.
.jpg” alt=”https://study.ashworthcollege.edu/access/content/group/8ef8b2f7-197d-41de-a4c4-db81a717c013/v9/Images/Lesson%206%20Exam/MA260%20Lesson%206%20exam%20question%207.JPG”>

A. 8.8

B. 6.2

C. 8.2

D. None of the values are correct

Question 40 of 40

2.5 Points

A researcher wishes to
estimate the mean amount of money spent per month on food by households in a
certain neighborhood. She desires a margin of error of $30. Past studies
suggest that a population standard deviation of $248 is reasonable. Estimate
the minimum sample size needed to estimate the population mean with the stated
accuracy.

A. 274

B. 284

C. 264

D. 272