ashworth college MA260 online exam 3 latest 2015 december

Part 1 of 1 – 85.0/
100.0 Points

Question 1 of 20
0.0/ 5.0 Points
The batting averages of the first three batters in the
Eureka College women’s softball team lineup are .310, .301, and .277. If the
first three batters are considered as the “lead-off group”, what is the batting
average of the group?
A. .301
B. .296
C. There is
insufficient information to answer the question
D. None of the above

Question 2 of 20
5.0/ 5.0 Points
Find the mode(s) for the given sample data.

66, 25, 66, 13, 25, 29, 56, 66
A. 25
B. 56
C. 25 & 66
D. 66

Question 3 of 20
5.0/ 5.0 Points
Use the range rule of thumb to approximate the standard
deviation.

496,598, 503, 528, 565, 601, 576, 543
A. 170.2
B. 60.6
C. 26.25
D. 18.75

Question 4 of 20
5.0/ 5.0 Points
The mathematics SAT scores of the seven students in a
mathematics seminar are 533, 553, 578, 586, 619, 626, and 633. Suppose that the
student with the score 533 drops the seminar and is replaced by a student with
a score of 585. What will happen to the mean and the median scores of the class?
A. Neither the mean
nor the median will change.
B. Both the median
and the mean will increase.
C. The median will
increase; the mean will be unchanged.
D. The mean will
increase; the median will be unchanged.

Question 5 of 20
5.0/ 5.0 Points
Al and Joe are two county sheriff’s deputies assigned to
watch for traffic violations. Their arrest and conviction records for May and
June are shown below.

Who had the best conviction percentage in June?

A. Al
B. Joe
C. They are equal
D. Cannot tell by
the data available

Question 6 of 20
0.0/ 5.0 Points
A softball player has a batting average of exactly .300 and
no more than
60 times at bat. Suppose this player gets 5 hits in her next
6 times at
bat. What is the highest possible average she could now
have?
A. .500
B. .833
C. .348
D. There is
insufficient information to answer the question

Question 7 of 20
5.0/ 5.0 Points
The students in Hugh Logan’s math class took the Scholastic
Aptitude Test. Their math scores are shown below. Find the mean score.

552 593358 352 537
349 357 596 470 482

A. 446.8
B. 474.6
C. 462.8
D. 464.6

Question 8 of 20
5.0/ 5.0 Points
The number of vehicles passing through a pharmacy drive-up
line with two windows during each 15-minute period was recorded. The results
are shown below. Find the median number of vehicles going through the line in a
fifteen-minute period.

16 8 24 22 30 19 18 27 11 15
17 24 26 23 7 25 21 16 20 14

A. 19.3
B. 20.1
C. 19.5
D. 19.6

Question 9 of 20
5.0/ 5.0 Points
The following data set is the GPAs of the students in a
statistics class.

1.93, 1.99, 2.00, 2.04, 2.12, 2.34, 2.55, 2.55, 2.75, 2.75,

2.80, 2.80, 2.85, 3.02, 3.12, 3.22, 3.31, 3.33, 3.45, 3.69

What percentile is a GPA of 2.34?

A. About the 6th
B. About the 15th
C. About the 30th
D. About the 60th

Question 10 of 20
5.0/ 5.0 Points
Suppose that your income is at the 81st percentile of wage
earners in the United States. What percent of wage earners make more than you
do?
A. 19%
B. 81%
C. Cannot be
calculated from the information given
D. None of the above

Question 11 of 20
5.0/ 5.0 Points
The grocery expenses for six families were $80.86, $47.74,
$57.92, $81.08, $75.18, and $88.08. Compute the mean grocery bill. Round your
answer to the nearest cent.
A. $71. 82
B. $73.79
C. $72.81
D. $71.81

Question 12 of 20
5.0/ 5.0 Points
The mathematics SAT scores of the seven students in a
mathematics seminar are 538, 550, 570, 593, 610, 622, and 634. Suppose the
student with the score 634 drops the seminar and is replaced by a student with
a score of 600. What will happen to the mean and the median scores of the
class?
A. Neither mean nor
median will change.
B. The median will
decrease, the mean will not change.
C. The median will
not change, the mean will decrease.
D. Both mean and
median will decrease.

Question 13 of 20
5.0/ 5.0 Points
Find the mode(s) for the given sample data. 20, 49, 46, 43,
49, 43, 49, 20, 22
A. 43
B. 49
C. 20
D. 22

Question 14 of 20
5.0/ 5.0 Points
Al and Joe are two county sheriff’s deputies assigned to
watch for traffic violations. Their arrest and conviction records for May and
June are shown below.

Who had the best conviction percentage in May?

A. Al
B. Joe
C. They are equal
D. Can not tell by
the data available

Question 15 of 20
5.0/ 5.0 Points
The mathematics SAT scores of the seven students in a
mathematics seminar are 533, 553, 578, 586, 619, 626, and 633. Suppose that the
student with the score 533 drops the seminar and is replaced by a student with
a score of 765. What will happen to the mean and the median scores of the
class?
A. The mean will
increase; the median will be unchanged.
B. The median will
increase; the mean will be unchanged.
C. Neither the mean
nor the median will change.
D. Both the median
and the mean will increase.

Question 16 of 20
5.0/ 5.0 Points
Find the mode(s) for the given sample data. 7.29, 7.41,
7.56, 7.29, 7.88, 7.99, 7.62
A. 7.56
B. 7.29
C. 7.577
D. 7.41

Question 17 of 20
0.0/ 5.0 Points
Consider the distribution of heights of all the players in
the National Basketball Association. What would you expect the shape of the
distribution to be?
A. Skewed right
B. Skewed left
C. Symmetric
D. Multi-peaked

Question 18 of 20
5.0/ 5.0 Points
Find the standard deviation for the given data. Round your
answer to one more decimal place than the original data.

22, 29, 21, 24, 27, 28, 25, 36

A. 4.8
B. 4.2
C. 2.8
D. 1.6

Question 19 of 20
5.0/ 5.0 Points
Last year, a road construction firm hired 11 new employees.
Their ages at hiring are listed below. Find the mean hiring age to one decimal
place.

23 19 30 33 27 31 58 22 21 26 29

A. 29.1
B. 28.0
C. 29.2
D. 29.0

Question 20 of 20
5.0/ 5.0 Points
The normal monthly precipitation (in inches) for August is
listed for 20 different U.S. cities. Find the median of the data.

A. 2.79 in.
B. 3.45 in.
C. 3.35 in.
D. 2.45 in.