MAT 167: Statistics, Test II
SOLUTIONS p. 1 of 12
Solution: Spring 2008 results. I made the exam out of 82 points instead of 84.
> summary ( s c o r e )
Min . 1 s t Qu . Median
Mean 3 rd Qu .
Max .
43.29
68.60
81.10
75.75
89.79
95.12
> par ( mfrow = c ( 1
MAT 167: Statistics, Final Exam
SOLUTIONS p. 1 of 14
Solution: Exam Results:
> summary ( s c o r e )
Min . 1 s t Qu . Median
Mean 3 rd Qu .
Max .
32.50
55.62
77.50
70.91
88.75
96.25
> par ( mfrow = c ( 1 , 2 ) )
> b o x p l o t ( s c o r e , main = Boxplo
Math 215 Spring 2011 Exam 1 Solutions
Low: 40 Average: 83 Median: 88 High: 100
Approximate grade breakdown (if I curved this exam):
90 100
A
80 90
B
0 80
C or below
1.
True For example,
, then with
there are infinite solutions, but with
there is no soluti
Math 215 Spring 2011 Exam 2 Solutions
Low: 35 Average: 80 Median: 80 High: 103
Approximate grade breakdown (if I curved this exam):
90 100
A
75 90
B
0 75
C or below
Many of my solutions below are more detailed than what I would expect from you.
1.
(
)
. T
Math 215 Spring 2010 Exam 3 Solutions
Low: 58 Average: 79 High: 98
Approximate grade breakdown (if I curved this exam):
85 100
A
70 85
B
0 70
C or below
or 12 6 5 5 4 4 3 3 2 2 1 1. Note: there are 6 couples (so
12 persons total), and the couples dont nec
1. An industrial process produces items of which 80% conform to specications. An inspector will take
a random sample of 100 items. In the sample, the probability that x or more items will conform to
specications is 0.30. What, using a suitable approximati
1. Educational data was recorded for 78 grade 7 students. For the students IQ, a boxplot
was drawn, as shown below.
What is the interquartile range?
(a) 64
(b) 50
(c) * 15
(d) 7.5
2. For the same students as in Question 1, each student was assessed on the