1. When computing a condence interval for the population mean when the population
SD is known, what value of z should be used for an 85% condence interval? (The
p
formula for the condence interval is x z / n.)
(612.tex) 85% in the middle leaves 15% for th
STAT 205 Spring 2007 Final Exam
~Z p
Name:_ANSWER KEY_
2
1 2 Y + Z ~ (1  ~ ) p p 2 2 where ~ = p 2 2 n + Z n + Z
2
2
p p ( ~1  ~2 ) Z
2
~ (1  ~ ) ~ (1  ~ ) p1 p1 p p2 Y + 1 Y2 + 1 where ~1  ~2 = 1 + 2 p p  n1 + 2 n2 + 2 n1 + 2 n2 + 2
(Oi  Ei ) 2
Larget  Statistics/Mathematics 309
Solution to Exam 10B
May 8, 2009
A manufacturer of medicinal tablets was interested in testing the measurement accuracy of seven different laboratories. A composite was prepared by grinding and mixing together many tabl
Math 215 Fall 2010 Exam 1 Solutions
Low: 53 Average: 87 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,
False
Multiply them to see their product is not the identity matrix.
True
and
has
Larget  Statistics/Mathematics 309
Solution to Exam 10C
May 8, 2009
Name:
1. The Leaning Tower of Pisa is an architectural wonder. Engineers concerned about the tower^AZs stability a have done extensive studies of its increasing tilt. Measurements of the
MAT 167: Statistics, Test II: Chapters 47
SOLUTIONS p. 1 of 9
1. Assume that mens waists are normally distributed with = 35 in and
= 2.3 in.
Solution: Lets write down the given information:
> mu = 35
> sigma = 2 . 3
(a) (1 point) If 1 man is randomly sel
I
5
points 1. The figure at right show f , f'
and
f
"
.
f
Correctly label each function in the plot
n
5 points 2. Sketch (onto the same plot) the derivative
of the function shown at right.
2
L0
points 3. Find the derivative of f (x) = 7x2 using the deriva
15 points
L. For
f (x) 
3xa
4x3 'J.2x2 + 5, whichhas derivative

'J,2x3
f '(x) =

!2x2

24x
rZx(x


2)(x +
t)
/6 Where does the function have its three \ocalkelative mins and maxs? Use /"(x) to
determine what type of point (min or max) each critica